Monday 8 October 2018

Impersonation in .NET

Recently, I had need to programmatically impersonate a Windows account which has elevated permissions. In my case, only one step in a multi-step process required the extended permissions so the impersonation was temporary.

To do so in .NET a  P/Invoke call into unmanaged code is required. The detail of which can be found here: WindowsIdentity.Impersonate

A call into unmanaged code is made in order to retrieve a user token. The token is then passed to a framework class which facilitates the impersonation.

I've written a small class which wraps this functionality and thought it may be of use to other people:

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