Compile error when updating your theme projects (4.4.5.41356 or later)

When updating your theme projects to version 4.4.5.41356 or later, you will need to make some edits to your theme project files to avoid getting a compile error.

Steps 

1. Go to the file:

   .\src\Epi B2B Commerce.Web\Themes\yourtheme\yourtheme.csproj  ("yourtheme" = theme name)

2. Open the file in a text editor.

3. Remove the 3 XML nodes containing the text "DotNetCompilerPlatform" (two Import nodes and one Reference)