New Post: TwitterCredentials.CreateCredentials initialisation exception

Thanks for looking into this. I've pasted the help->about system info below. In the meantime, I'll try and downgrade my Unity and see if that helps (seems like it will).

Craig

Microsoft Visual Studio Express 2012 for Windows Desktop
Version 11.0.61030.00 Update 4
Microsoft .NET Framework
Version 4.5.50709

Installed Version: Desktop Express

Team Explorer for Visual Studio 2012 05695-004-0030004-02640
Microsoft Team Explorer for Visual Studio 2012

Visual Basic 2012 05695-004-0030004-02640
Microsoft Visual Basic 2012

Visual C# 2012 05695-004-0030004-02640
Microsoft Visual C# 2012

Visual C++ 2012 05695-004-0030004-02640
Microsoft Visual C++ 2012

NuGet Package Manager 2.8.50126.400
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

SQL Server Data Tools 11.1.20828.01
Microsoft SQL Server Data Tools