T4MVC is generating T4MVC.cs and T4MVC1.cs

Question

• VS2017 15.4.1
  • ASP.NET MVC 5.2.3
  • T4MVC 4.0.0
  • AutoT4MVC 1.5.3
  • Resharper

I have been using T4MVC] for many months in this project without issue. However today each time I change a controller method it is generating two T4MVC files:

instead of updating T4MVC.cs which ultimately means the project wont't compile and I have to delete T4MVC1.cs.

Has anyone seen this behaviour or has some ideas of a fix?

Answer 1

Here's the steps I do to fix it:

• Delete T4MVC1.cs file.
• Unload your project.
• Edit the .csproj file.

• Check the following tag:

  <Compile Include="T4MVC.cs"> <AutoGen>True</AutoGen> <DesignTime>True</DesignTime> <DependentUpon>T4MVC.tt</DependentUpon> </Compile>

  Make sure there's only one of these and it's T4MVC.cs. Remove T4MVC1.cs block if you have it.

• Check the following tag:

  <None Include="T4MVC.tt"> <Generator>TextTemplatingFileGenerator</Generator> <LastGenOutput>T4MVC.cs</LastGenOutput> </None>

  Make sure the <LastGenOutput> is T4MVC.cs. If not, edit it to be T4MVC.cs.

• Save the .csproj file.

• Reload the project.
• Rebuild
• Make sure to check in that code so won't cause any trouble in the future.