Soliving: Visual Studio 2013 U1 Lightswitch – March 2014–Can’t create project (.lsxtproj) is not supported.

After updating the SQL Server Data Tools in Microsoft Visual Studio 2013, creating a LigthSwitch project will result in an error: ‘…\Application1.lsxtproj’ cannot be opened because its project type (.lsxtproj) is not supported by this version of the application. To open it, please use a version that supports this type …

Solving: Found conflicts between different versions of the same dependent assembly.

  I was getting the warning: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1546,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly. The was caused by the referenced assembly System.Net.Http. Solution Edit the *.csproj file and change: <Reference Include="System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" /> to <Reference Include="System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />   …