Display a file hierarchically under another file in Visual Studio [duplicate]

Question

This question already has an answer here:

• Add a file under a file in Solution Explorer 2 answers

In Visual Studio, I'd like to show a hierarchical relationship between certain files.

A typical ASP.NET WebForms application provides an example of what I want. Say that I have a file named Page.aspx. Files named Page.aspx.cs and Page.aspx.designer.cs would typically appear hierarchically below Page.aspx in Solution Explorer.

Answer 1

If you want File A to appear hierarchically under File B in Solution Explorer, do the following:

Open your project file, go to the <Content Include> (or <None Include>, or what have you) node for File A and add a <DependentUpon>File B</DependentUpon> child to it. The result should look similar to this:

<Content Include="File A">
  <DependentUpon>File B</DependentUpon>
</Content>`