# OpcSpecialFolderPathProbing Class

> Reference: Provides mechanisms to evaluate the full qualified existence and accessibility of a string-based path which points to a directory in the file system.

<span class="api-meta">since v2.7</span>

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</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">OpcSpecialFolderPathProbing Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Provides mechanisms to evaluate the full qualified existence and accessibility of a [string](https://learn.microsoft.com/dotnet/api/system.string)-based path which points to a directory in the file system. The thereby evaluated directories are identified by one of the values defined by the [Environment.SpecialFolder](https://learn.microsoft.com/dotnet/api/system.environment) enumeration.

## Syntax

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

```csharp
public class OpcSpecialFolderPathProbing : OpcPathProbing
```

</div>

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

```vbnet
Public Class OpcSpecialFolderPathProbing
    Inherits OpcPathProbing
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcPathProbing](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpathprobing/) → **OpcSpecialFolderPathProbing**

## Constructors

| Name | Description |
|---|---|
| [OpcSpecialFolderPathProbing](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcspecialfolderpathprobing/members#opcspecialfolderpathprobing) | Initializes a new instance of the [OpcDirectoryPathProbing](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdirectorypathprobing/) class using the `folder` information specified. |

## Properties

| Name | Description |
|---|---|
| [Folder](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcspecialfolderpathprobing/members#folder) | Gets the [Environment.SpecialFolder](https://learn.microsoft.com/dotnet/api/system.environment) value whic identifies the path to the directory in the file system to evaluate when calling [Evaluate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpathprobing/members#evaluate). |

## Methods

| Name | Description |
|---|---|
| [EvaluateCore](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcspecialfolderpathprobing/members#evaluatecore)<span class="api-meta">protected · override</span> | Processes the implementation specific evaluation of the [Folder](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcspecialfolderpathprobing/members#folder) associated with this OpcSpecialFolderPathProbing instance and offers the determined and fulfilled path information accordingly. |

Inherits members from [OpcPathProbing](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpathprobing/members).

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.7–v2.59 |