# API Changes in v2.54 > Reference: API changes of Opc.UaFx.Advanced in v2.54: 93 added, 10 removed, 9 changed, 0 obsoleted.
Releases
v2.54.0, v2.54.1, v2.54.1.1
Compared with
v2.53.1
Package
Opc.UaFx.Advanced
## Added ### Opc.UaFx | Symbol | Signature | |---|---| | [IOpcEventFieldSet](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopceventfieldset/)1 member | `public interface IOpcEventFieldSet` | | [IOpcReadOnlyNodeDataStore.ToArray](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcreadonlynodedatastore/members#toarray) | `object[] ToArray()` | | [IOpcStateMachine](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcstatemachine/)9 members | `public interface IOpcStateMachine` | | [IOpcStateMachine<T>](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcstatemachine-1/)4 members | `public interface IOpcStateMachine : IOpcStateMachine` | | [OpcCertificateValidationRules.DisableBackwardsCompatibleValidation](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatevalidationrules/#disablebackwardscompatiblevalidation) | `DisableBackwardsCompatibleValidation = 2` | | [OpcEndpointDescription.SupportedTokenTypes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcendpointdescription/members#supportedtokentypes) | `public IEnumerable SupportedTokenTypes { get; }` | | [OpcEvent.Create](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcevent/members#create) | `public static OpcEvent Create(OpcContext context, OpcEventFilter filter, IEnumerable data)` | | [OpcEventDataView](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventdataview/)10 members | `public class OpcEventDataView : IOpcReadOnlyNodeDataStore, IOpcNamespaceResolver` | | [OpcFiniteStateMachineNode.AvailableStates](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#availablestates) | `public OpcNodeId[] AvailableStates { get; set; }` | | [OpcFiniteStateMachineNode.AvailableStatesNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#availablestatesnode) | `public OpcNodeIdArrayVariableNode AvailableStatesNode { get; }` | | [OpcFiniteStateMachineNode.AvailableTransitions](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#availabletransitions) | `public OpcNodeId[] AvailableTransitions { get; set; }` | | [OpcFiniteStateMachineNode.AvailableTransitionsNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#availabletransitionsnode) | `public OpcNodeIdArrayVariableNode AvailableTransitionsNode { get; }` | | [OpcFiniteStateMachineNode.CanChangeStateTo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#canchangestateto-opc-uafx-opccontext-system-object-system-object) | `public bool CanChangeStateTo(OpcContext context, object oldState, object newState)` | | [OpcFiniteStateMachineNode.CanChangeStateTo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#canchangestateto-opc-uafx-opccontext-system-object) | `public bool CanChangeStateTo(OpcContext context, object newState)` | | [OpcFiniteStateMachineNode.CreateSubStatesMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#createsubstatesmachinenode) | `protected virtual OpcFiniteStateMachineNode CreateSubStatesMachineNode(object state)` | | [OpcFiniteStateMachineNode.GetSubStatesMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#getsubstatesmachinenode-noparams) | `public OpcFiniteStateMachineNode GetSubStatesMachineNode()` | | [OpcFiniteStateMachineNode.GetSubStatesMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#getsubstatesmachinenode-system-object) | `public OpcFiniteStateMachineNode GetSubStatesMachineNode(object state)` | | [OpcFiniteStateMachineNode.IsAccessible](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#isaccessible) | `public override bool IsAccessible(OpcContext context, OpcNodeId viewId)` | | [OpcFiniteStateMachineNode.SupportsCurrentState](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/members#supportscurrentstate) | `public virtual bool SupportsCurrentState { get; }` | | [OpcFiniteStateMachineNode<T>](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode-1/)16 members | `public class OpcFiniteStateMachineNode : OpcFiniteStateMachineNode, IOpcNode, IOpcNodeInfo, IOpcStateMachine, IOpcStateMachine` | | [OpcFolderNode.InheritReferenceTypeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfoldernode/members#inheritreferencetypeid) | `protected override bool InheritReferenceTypeId { get; }` | | [OpcInstanceNode.InheritReferenceTypeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/members#inheritreferencetypeid) | `protected virtual bool InheritReferenceTypeId { get; }` | | [OpcInstanceNodeSnapshot.ToArray](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenodesnapshot/members#toarray) | `public object[] ToArray()` | | [OpcNode.EventReported](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#eventreported) | `public event OpcNodeEventReportedEventHandler EventReported` | | [OpcNode.InitializeChildren](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#initializechildren) | `protected virtual void InitializeChildren(OpcContext context)` | | [OpcNode.IsAccessible](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#isaccessible) | `public virtual bool IsAccessible(OpcContext context, OpcNodeId viewId)` | | [OpcNode.OnEventReported](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#oneventreported) | `protected virtual void OnEventReported(OpcNodeEventReportedEventArgs e)` | | [OpcNode.ResolveModel](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#resolvemodel) | `protected virtual OpcNodeModel ResolveModel()` | | [OpcNodeEventReportedEventArgs](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeeventreportedeventargs/)2 members | `public class OpcNodeEventReportedEventArgs : OpcNodeEventArgs` | | [OpcNodeEventReportedEventHandler](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeeventreportedeventhandler/) | `public delegate void OpcNodeEventReportedEventHandler(object sender, OpcNodeEventReportedEventArgs e)` | | [OpcNodeIdArrayVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidarrayvariablenode/)19 members | `public class OpcNodeIdArrayVariableNode : OpcDataVariableNode, IOpcNode, IOpcVariableNodeInfo, IOpcNodeInfo` | | [OpcNodeIdVariableNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidvariablenode/)11 members | `public class OpcNodeIdVariableNode : OpcDataVariableNode, IOpcNode, IOpcVariableNodeInfo, IOpcNodeInfo` | | [OpcNodeSet.GetNodes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeset/members#getnodes) | `public IEnumerable GetNodes()` | | [OpcObjectNode.IsHistorizingEvents](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/members#ishistorizingevents) | `public bool IsHistorizingEvents { get; set; }` | | [OpcReadEventHistoryDetails.NumberOfEvents](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#numberofevents) | `public int NumberOfEvents { get; set; }` | | [OpcReadEventHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#opcreadeventhistorydetails-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter) | `public OpcReadEventHistoryDetails(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter)` | | [OpcReadEventHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#opcreadeventhistorydetails-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter) | `public OpcReadEventHistoryDetails(DateTime? startTime, DateTime? endTime, OpcEventFilter filter)` | | [OpcReadEventHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#opcreadeventhistorydetails-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter) | `public OpcReadEventHistoryDetails(DateTime? startTime, int numberOfEvents, OpcEventFilter filter)` | | [OpcReadEventHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#opcreadeventhistorydetails-system-int32-opc-uafx-opceventfilter) | `public OpcReadEventHistoryDetails(int numberOfEvents, OpcEventFilter filter)` | | [OpcReadNodeIdArrayVariableValueCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadnodeidarrayvariablevaluecallback/) | `public delegate OpcVariableValue OpcReadNodeIdArrayVariableValueCallback(OpcReadVariableValueContext context, OpcVariableValue value)` | | [OpcStructEncodingField](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstructencodingfield/)2 members | `public class OpcStructEncodingField : OpcStructField` | | [OpcWriteNodeIdArrayVariableValueCallback](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcwritenodeidarrayvariablevaluecallback/) | `public delegate OpcVariableValue OpcWriteNodeIdArrayVariableValueCallback(OpcWriteVariableValueContext context, OpcVariableValue value)` | ### Opc.UaFx.Client | Symbol | Signature | |---|---| | [IOpcEventHistoryNavigator<T>](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopceventhistorynavigator-1/)8 members | `public interface IOpcEventHistoryNavigator : IEnumerable, IEnumerable, IDisposable where T : OpcEvent` | | [IOpcEventHistoryPage<T>](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopceventhistorypage-1/)4 members | `public interface IOpcEventHistoryPage : IEnumerable, IEnumerable where T : OpcEvent` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, int nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, int nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter, OpcReadEventHistory command)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter) | `public IEnumerable ReadEventHistory(DateTime? startTime, DateTime? endTime, int nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opcnodeid-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcNodeId nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-string-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, string nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-string-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, string nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory) | `public IEnumerable ReadEventHistory(DateTime? startTime, DateTime? endTime, OpcEventFilter filter, OpcReadEventHistory command)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opcnodeid-opc-uafx-opceventfilter) | `public IEnumerable ReadEventHistory(DateTime? startTime, DateTime? endTime, OpcNodeId nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-string-system-int32-opc-uafx-opceventfilter) | `public IEnumerable ReadEventHistory(DateTime? startTime, DateTime? endTime, string nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-string-opc-uafx-opceventfilter) | `public IEnumerable ReadEventHistory(DateTime? startTime, DateTime? endTime, string nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, int nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, int nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, OpcEventFilter filter, OpcReadEventHistory command)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opcnodeid-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, OpcNodeId nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-system-string-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, string nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-nullable-of-system-datetime-system-int32-system-string-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(DateTime? startTime, int numberOfEvents, string nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, int nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, int nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, OpcEventFilter filter, OpcReadEventHistory command)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-opc-uafx-opcnodeid-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, OpcNodeId nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-system-string-system-int32-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, string nodeId, int namespaceIndex, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-system-int32-system-string-opc-uafx-opceventfilter) | `public IOpcEventHistoryNavigator ReadEventHistory(int numberOfEvents, string nodeId, OpcEventFilter filter)` | | [OpcClient.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventhistory#readeventhistory-opc-uafx-opcnodeid-opc-uafx-opcreadeventhistorydetails) | `public IOpcEventHistoryNavigator ReadEventHistory(OpcNodeId nodeId, OpcReadEventHistoryDetails details)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter, IEnumerable nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter, IEnumerable commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-opcnodeid-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter, params OpcNodeId[] nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, DateTime? endTime, int numberOfEvents, OpcEventFilter filter, params OpcReadEventHistory[] commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) | `public IDictionary> ReadEventsHistory(DateTime? startTime, DateTime? endTime, OpcEventFilter filter, IEnumerable nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadeventhistory) | `public IDictionary> ReadEventsHistory(DateTime? startTime, DateTime? endTime, OpcEventFilter filter, IEnumerable commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter-opc-uafx-opcnodeid-array) | `public IDictionary> ReadEventsHistory(DateTime? startTime, DateTime? endTime, OpcEventFilter filter, params OpcNodeId[] nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory-array) | `public IDictionary> ReadEventsHistory(DateTime? startTime, DateTime? endTime, OpcEventFilter filter, params OpcReadEventHistory[] commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, int numberOfEvents, OpcEventFilter filter, IEnumerable nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, int numberOfEvents, OpcEventFilter filter, IEnumerable commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-opcnodeid-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, int numberOfEvents, OpcEventFilter filter, params OpcNodeId[] nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-nullable-of-system-datetime-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(DateTime? startTime, int numberOfEvents, OpcEventFilter filter, params OpcReadEventHistory[] commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid-opc-uafx-opcreadeventhistorydetails) | `public IOpcEventHistoryNavigator ReadEventsHistory(IEnumerable nodeIds, OpcReadEventHistoryDetails details)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) | `public IOpcEventHistoryNavigator ReadEventsHistory(int numberOfEvents, OpcEventFilter filter, IEnumerable nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-int32-opc-uafx-opceventfilter-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadeventhistory) | `public IOpcEventHistoryNavigator ReadEventsHistory(int numberOfEvents, OpcEventFilter filter, IEnumerable commands)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-int32-opc-uafx-opceventfilter-opc-uafx-opcnodeid-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(int numberOfEvents, OpcEventFilter filter, params OpcNodeId[] nodeIds)` | | [OpcClient.ReadEventsHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readeventshistory#readeventshistory-system-int32-opc-uafx-opceventfilter-opc-uafx-client-opcreadeventhistory-array) | `public IOpcEventHistoryNavigator ReadEventsHistory(int numberOfEvents, OpcEventFilter filter, params OpcReadEventHistory[] commands)` | | [OpcReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadeventhistory/)5 members | `public class OpcReadEventHistory : OpcNodeServiceCommand` | ### Opc.UaFx.Server | Symbol | Signature | |---|---| | [IOpcEventHistoryProvider](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.iopceventhistoryprovider/)2 members | `public interface IOpcEventHistoryProvider` | | [OpcNodeManager.ReadEventHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcnodemanager/members#readeventhistory) | `protected virtual IEnumerable ReadEventHistory(OpcContext context, IOpcNode node, OpcEventFilter eventFilter, DateTime? startTime, DateTime? endTime, bool timeFlowsBackward, uint? maxCount)` | | [OpcNodeManager.RetrieveEventHistoryProvider](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcnodemanager/members#retrieveeventhistoryprovider) | `protected virtual IOpcEventHistoryProvider RetrieveEventHistoryProvider(IOpcNode node)` | | [OpcServerBinding.UseExclusiveAddress](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcserverbinding/members#useexclusiveaddress) | `public bool UseExclusiveAddress { get; set; }` | ### Opc.UaFx.Services | Symbol | Signature | |---|---| | [IOpcReadEventsHistoryService](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.iopcreadeventshistoryservice/)3 members | `[CLSCompliant(false)] public interface IOpcReadEventsHistoryService : IOpcService` | | [OpcReadEventsHistoryRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcreadeventshistoryrequest/)7 members | `[CLSCompliant(false)] public class OpcReadEventsHistoryRequest : OpcServiceRequest, IOpcServiceRequest` | | [OpcReadEventsHistoryResponse](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcreadeventshistoryresponse/)4 members | `[CLSCompliant(false)] public class OpcReadEventsHistoryResponse : OpcServiceResponse, IOpcServiceResponse` | ## Removed ### Opc.UaFx | Symbol | Signature | |---|---| | OpcEventNodeView.EventTypeId | `public OpcNodeId EventTypeId { get; }` | | OpcEventNodeView.Filter | `public OpcEventFilter Filter { get; }` | | OpcEventNodeView.Get<T> | `public T Get(OpcAttribute attribute, OpcName name)` | | OpcEventNodeView.Get<T> | `public T Get(OpcAttribute attribute, OpcNamePath path)` | | OpcEventNodeView.Get<T> | `public T Get(OpcAttribute attribute, params OpcName[] pathElements)` | | OpcEventNodeView.Get<T> | `public T Get(OpcAttribute attribute, string name = "")` | | OpcEventNodeView.Get<T> | `public T Get(OpcName name)` | | OpcEventNodeView.Get<T> | `public T Get(string name = "")` | | OpcReadEventHistoryDetails.NumberOfValues | `public int NumberOfValues { get; set; }` | | OpcReadEventHistoryDetails | `public OpcReadEventHistoryDetails()` | ## Changed ### Opc.UaFx | Symbol | Signature (old, new) | |---|---| | [OpcEventDataSetItem](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventdatasetitem/) | `public class OpcEventDataSetItem : OpcNotificationDataSetItem`
`public class OpcEventDataSetItem : OpcNotificationDataSetItem, IOpcEventFieldSet` | | [OpcEventNodeView](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnodeview/) | `public class OpcEventNodeView : IOpcReadOnlyNodeDataStore, IOpcNamespaceResolver`
`public class OpcEventNodeView : OpcEventDataView, IOpcReadOnlyNodeDataStore, IOpcNamespaceResolver` | | [OpcEventNodeView.Data](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opceventnodeview/members#data) | `public OpcEventDataSetItem Data { get; }`
`public IOpcEventFieldSet Data { get; }` | | [OpcExclusiveLimitStateMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcexclusivelimitstatemachinenode/) | `[OpcNodeType(9318)] public class OpcExclusiveLimitStateMachineNode : OpcFiniteStateMachineNode, IOpcNode, IOpcNodeInfo`
`[OpcNodeType(9318)] public class OpcExclusiveLimitStateMachineNode : OpcFiniteStateMachineNode, IOpcNode, IOpcNodeInfo, IOpcStateMachine` | | [OpcFiniteStateMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcfinitestatemachinenode/) | `[OpcNodeType(2771)] public class OpcFiniteStateMachineNode : OpcStateMachineNode, IOpcNode, IOpcNodeInfo`
`[OpcNodeType(2771)] public class OpcFiniteStateMachineNode : OpcStateMachineNode, IOpcNode, IOpcNodeInfo, IOpcStateMachine` | | [OpcReadEventHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/) | `public class OpcReadEventHistoryDetails : OpcReadHistoryDetails`
`public class OpcReadEventHistoryDetails` | | [OpcReadEventHistoryDetails.Filter](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadeventhistorydetails/members#filter) | `public OpcEventFilter Filter { get; }`
`public OpcEventFilter Filter { get; set; }` | | [OpcShelvedStateMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcshelvedstatemachinenode/) | `public class OpcShelvedStateMachineNode : OpcFiniteStateMachineNode, IOpcNode, IOpcNodeInfo`
`public class OpcShelvedStateMachineNode : OpcFiniteStateMachineNode, IOpcNode, IOpcNodeInfo, IOpcStateMachine` | ### Opc.UaFx.Client | Symbol | Signature (old, new) | |---|---| | [OpcClient](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/) | `public class OpcClient : OpcApplicationInstance, IDisposable, IOpcApplicationInstance, IOpcNamespaceResolver, IOpcAddNodesService, IOpcService, IOpcAddReferencesService, IOpcService, IOpcBrowseService, IOpcService, IOpcBrowseNextService, IOpcService, IOpcCallMethodsService, IOpcService, IOpcDeleteNodesService, IOpcService, IOpcDeleteReferencesService, IOpcService, IOpcReadNodesService, IOpcService, IOpcReadNodesHistoryService, IOpcService, IOpcRegisterNodesService, IOpcService, IOpcTranslatePathsService, IOpcService, IOpcUnregisterNodesService, IOpcService, IOpcUpdateNodesHistoryService, IOpcService, IOpcWriteNodesService, IOpcService`
`public class OpcClient : OpcApplicationInstance, IDisposable, IOpcApplicationInstance, IOpcNamespaceResolver, IOpcAddNodesService, IOpcService, IOpcAddReferencesService, IOpcService, IOpcBrowseService, IOpcService, IOpcBrowseNextService, IOpcService, IOpcCallMethodsService, IOpcService, IOpcDeleteNodesService, IOpcService, IOpcDeleteReferencesService, IOpcService, IOpcReadEventsHistoryService, IOpcService, IOpcReadNodesService, IOpcService, IOpcReadNodesHistoryService, IOpcService, IOpcRegisterNodesService, IOpcService, IOpcTranslatePathsService, IOpcService, IOpcUnregisterNodesService, IOpcService, IOpcUpdateNodesHistoryService, IOpcService, IOpcWriteNodesService, IOpcService` |