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POImpersonation throws FileNotFoundException with WindowsIdentity in Powershell
 

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    <p>I am encountering a somewhat weird error with performing impersonation in PowerShell and C#. Executing the folowing code does not show any errors. </p> <pre><code>PSObject result = null; using (PowerShell powershell = PowerShell.Create()) { RunspaceConfiguration config = RunspaceConfiguration.Create(); powershell.Runspace = RunspaceFactory.CreateRunspace(config); powershell.Runspace.Open(); powershell.AddScript(String.Format(CmdletMap[PSVocab.OsBootTime], this.ComputerName)); result = powershell.Invoke().First(); powershell.Runspace.Close(); } return DateTime.Parse(result.ToString()); </code></pre> <p>where the PS script for <code>CmdletMap[PSVocab.OsBootTime]</code> is simply: </p> <pre><code>$info = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $computer ; $info.ConvertToDateTime($info.LastBootUpTime) </code></pre> <p>The above C# code works fine locally. However, once I had this same block with Windows impersonation like so:</p> <pre><code>WindowsIdentity ImpersonatedIdentity = new WindowsIdentity(ImpersonateUserName); WindowsImpersonationContext impersonatedContext = ImpersonatedIdentity.Impersonate(); try { PSObject result = null; using (PowerShell powershell = PowerShell.Create()) { RunspaceConfiguration config = RunspaceConfiguration.Create(); powershell.Runspace = RunspaceFactory.CreateRunspace(config); powershell.Runspace.Open(); powershell.AddScript(String.Format(CmdletMap[PSVocab.OsBootTime], this.ComputerName)); result = powershell.Invoke().First(); powershell.Runspace.Close(); } return DateTime.Parse(result.ToString()); } catch (Exception ex) { // do logging here } </code></pre> <p>I get the following exception: </p> <pre><code>FileNotFoundException: C:\Windows\assembly\GAC_MSIL\System.Management.Automation\1.0.0.0__31bf3856ad364e35\System.Management.Automation.dll </code></pre> <p>and debugging shows that it fails at <code>RunspaceConfiguration.Create()</code>. Not sure why though.</p> <p>The DLL though is already registered in the GAC though as well as being referenced in the project itself. Also confirmed that the paths and version are correct. </p> <p>References taken from:</p> <ul> <li><a href="http://blogs.msdn.com/b/powershell/archive/2007/09/10/impersonation-and-hosting-powershell.aspx" rel="nofollow noreferrer">Impersonation and Hosting PowerShell</a></li> <li><a href="https://stackoverflow.com/questions/2656553/asp-net-powershell-impersonation">ASP.NET PowerShell Impersonation</a></li> </ul> <p>Can someone give an insight to this?</p>
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