ProxyAssemblyNotLoadedException Class
.NET Framework 3.5
Contains information about an exception that is raised when there is a problem loading an assembly that contains client-side providers
Assembly: UIAutomationTypes (in UIAutomationTypes.dll)
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.