# OpcClient.ReadNodesHistoryModified Method

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcClient</a></dd>
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.client">Opc.UaFx.Client</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Members</dt>
<dd><a href="./members">OpcClient Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

<span class="api-meta">17 overloads</span>

| Overload | Description |
|---|---|
| [ReadNodesHistoryModified(IEnumerable&lt;OpcNodeId&gt;, OpcReadHistoryDetails)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid-opc-uafx-opcreadhistorydetails)<span class="api-meta">since v2.23</span> |  |
| [ReadNodesHistoryModified(int, IEnumerable&lt;OpcNodeId&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-int32-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) |  |
| [ReadNodesHistoryModified(DateTime?, int, IEnumerable&lt;OpcNodeId&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-int32-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, int, IEnumerable&lt;OpcNodeId&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, IEnumerable&lt;OpcNodeId&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-collections-generic-ienumerable-of-opc-uafx-opcnodeid) |  |
| [ReadNodesHistoryModified(int, params OpcNodeId\[\])](#readnodeshistorymodified-system-int32-opc-uafx-opcnodeid-array) |  |
| [ReadNodesHistoryModified(DateTime?, int, params OpcNodeId\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-int32-opc-uafx-opcnodeid-array) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, int, params OpcNodeId\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-opcnodeid-array) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, params OpcNodeId\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-opcnodeid-array) |  |
| [ReadNodesHistoryModified(int, IEnumerable&lt;OpcReadNodeHistory&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-int32-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadnodehistory) |  |
| [ReadNodesHistoryModified(DateTime?, int, IEnumerable&lt;OpcReadNodeHistory&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-int32-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadnodehistory) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, int, IEnumerable&lt;OpcReadNodeHistory&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadnodehistory) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, IEnumerable&lt;OpcReadNodeHistory&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/readnodeshistorymodified#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-collections-generic-ienumerable-of-opc-uafx-client-opcreadnodehistory) |  |
| [ReadNodesHistoryModified(int, params OpcReadNodeHistory\[\])](#readnodeshistorymodified-system-int32-opc-uafx-client-opcreadnodehistory-array) |  |
| [ReadNodesHistoryModified(DateTime?, int, params OpcReadNodeHistory\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-int32-opc-uafx-client-opcreadnodehistory-array) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, int, params OpcReadNodeHistory\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-system-int32-opc-uafx-client-opcreadnodehistory-array) |  |
| [ReadNodesHistoryModified(DateTime?, DateTime?, params OpcReadNodeHistory\[\])](#readnodeshistorymodified-system-nullable-of-system-datetime-system-nullable-of-system-datetime-opc-uafx-client-opcreadnodehistory-array) |  |

**Exceptions (all overloads)**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) |  |
| [InvalidOperationException](https://learn.microsoft.com/dotnet/api/system.invalidoperationexception) |  |
| [OpcException](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcexception/) |  |
| [ObjectDisposedException](https://learn.microsoft.com/dotnet/api/system.objectdisposedexception) |  |

## ReadNodesHistoryModified(IEnumerable&lt;OpcNodeId&gt;, OpcReadHistoryDetails)

<span class="api-meta">since v2.23</span>

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    IEnumerable<OpcNodeId> nodeIds,
    OpcReadHistoryDetails details)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    nodeIds As IEnumerable(Of OpcNodeId),
    details As OpcReadHistoryDetails) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `nodeIds` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)&gt; |  |
| `details` | [OpcReadHistoryDetails](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadhistorydetails/) |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(int, IEnumerable&lt;OpcNodeId&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    int numberOfValues,
    IEnumerable<OpcNodeId> nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    numberOfValues As Integer,
    nodeIds As IEnumerable(Of OpcNodeId)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, int, IEnumerable&lt;OpcNodeId&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    int numberOfValues,
    IEnumerable<OpcNodeId> nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    numberOfValues As Integer,
    nodeIds As IEnumerable(Of OpcNodeId)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, int, IEnumerable&lt;OpcNodeId&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    int numberOfValues,
    IEnumerable<OpcNodeId> nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    numberOfValues As Integer,
    nodeIds As IEnumerable(Of OpcNodeId)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, IEnumerable&lt;OpcNodeId&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IDictionary<OpcNodeId, IEnumerable<OpcModifiedHistoryValue>> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    IEnumerable<OpcNodeId> nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    nodeIds As IEnumerable(Of OpcNodeId)) As IDictionary(Of OpcNodeId, IEnumerable(Of OpcModifiedHistoryValue))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `nodeIds` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)&gt; |  |

**Returns**

[IDictionary](https://learn.microsoft.com/dotnet/api/system.collections.generic.idictionary-2)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/), [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;&gt;

## ReadNodesHistoryModified(int, params OpcNodeId\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    int numberOfValues,
    params OpcNodeId[] nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    numberOfValues As Integer,
    ParamArray nodeIds As OpcNodeId()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | params [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, int, params OpcNodeId\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    int numberOfValues,
    params OpcNodeId[] nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    numberOfValues As Integer,
    ParamArray nodeIds As OpcNodeId()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | params [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, int, params OpcNodeId\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    int numberOfValues,
    params OpcNodeId[] nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    numberOfValues As Integer,
    ParamArray nodeIds As OpcNodeId()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `nodeIds` | params [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, params OpcNodeId\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IDictionary<OpcNodeId, IEnumerable<OpcModifiedHistoryValue>> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    params OpcNodeId[] nodeIds)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    ParamArray nodeIds As OpcNodeId()) As IDictionary(Of OpcNodeId, IEnumerable(Of OpcModifiedHistoryValue))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `nodeIds` | params [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)[] |  |

**Returns**

[IDictionary](https://learn.microsoft.com/dotnet/api/system.collections.generic.idictionary-2)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/), [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;&gt;

## ReadNodesHistoryModified(int, IEnumerable&lt;OpcReadNodeHistory&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    int numberOfValues,
    IEnumerable<OpcReadNodeHistory> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    numberOfValues As Integer,
    commands As IEnumerable(Of OpcReadNodeHistory)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, int, IEnumerable&lt;OpcReadNodeHistory&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    int numberOfValues,
    IEnumerable<OpcReadNodeHistory> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    numberOfValues As Integer,
    commands As IEnumerable(Of OpcReadNodeHistory)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, int, IEnumerable&lt;OpcReadNodeHistory&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    int numberOfValues,
    IEnumerable<OpcReadNodeHistory> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    numberOfValues As Integer,
    commands As IEnumerable(Of OpcReadNodeHistory)) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)&gt; |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, IEnumerable&lt;OpcReadNodeHistory&gt;)

<div class="api-signature" data-lang="csharp">

```csharp
public IDictionary<OpcNodeId, IEnumerable<OpcModifiedHistoryValue>> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    IEnumerable<OpcReadNodeHistory> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    commands As IEnumerable(Of OpcReadNodeHistory)) As IDictionary(Of OpcNodeId, IEnumerable(Of OpcModifiedHistoryValue))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)&gt; |  |

**Returns**

[IDictionary](https://learn.microsoft.com/dotnet/api/system.collections.generic.idictionary-2)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/), [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;&gt;

## ReadNodesHistoryModified(int, params OpcReadNodeHistory\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    int numberOfValues,
    params OpcReadNodeHistory[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    numberOfValues As Integer,
    ParamArray commands As OpcReadNodeHistory()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | params [OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, int, params OpcReadNodeHistory\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    int numberOfValues,
    params OpcReadNodeHistory[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    numberOfValues As Integer,
    ParamArray commands As OpcReadNodeHistory()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | params [OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, int, params OpcReadNodeHistory\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IOpcNodeHistoryNavigator<OpcModifiedHistoryValue> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    int numberOfValues,
    params OpcReadNodeHistory[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    numberOfValues As Integer,
    ParamArray commands As OpcReadNodeHistory()) As IOpcNodeHistoryNavigator(Of OpcModifiedHistoryValue)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `numberOfValues` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) |  |
| `commands` | params [OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)[] |  |

**Returns**

[IOpcNodeHistoryNavigator](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.iopcnodehistorynavigator-1/)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;

## ReadNodesHistoryModified(DateTime?, DateTime?, params OpcReadNodeHistory\[\])

<div class="api-signature" data-lang="csharp">

```csharp
public IDictionary<OpcNodeId, IEnumerable<OpcModifiedHistoryValue>> ReadNodesHistoryModified(
    DateTime? startTime,
    DateTime? endTime,
    params OpcReadNodeHistory[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Function ReadNodesHistoryModified(
    startTime As Date?,
    endTime As Date?,
    ParamArray commands As OpcReadNodeHistory()) As IDictionary(Of OpcNodeId, IEnumerable(Of OpcModifiedHistoryValue))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `startTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `endTime` | [Nullable](https://learn.microsoft.com/dotnet/api/system.nullable-1)&lt;[DateTime](https://learn.microsoft.com/dotnet/api/system.datetime)&gt; |  |
| `commands` | params [OpcReadNodeHistory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcreadnodehistory/)[] |  |

**Returns**

[IDictionary](https://learn.microsoft.com/dotnet/api/system.collections.generic.idictionary-2)&lt;[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/), [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcModifiedHistoryValue](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcmodifiedhistoryvalue/)&gt;&gt;