Dependency Injector does not work with Razor Pages (VSIX-65)

[DrewBrasher]

If I try to use the Dependency Injector in the .cshtml.cs file of a Razor Page, it gets the error:
"Could not inject dependency because the class was not found in his file"

Jira issue

[DrewBrasher]

I think this issue is because Razor Pages file names do not match the class names. So this method:

Lombiq-Orchard-Visual-Studio-Extension/Lombiq.Vsix.Orchard/Services/DependencyInjector/DependencyInjector.cs

Lines 90 to 96 in 2a82482

	public string GetExpectedClassName(Document document)
	{
	// We should never get an exception here. This is just to ensure we access DTE on the main thread and get
	// rid of the VSTHRD010 violation.
	Microsoft.VisualStudio.Shell.ThreadHelper.ThrowIfNotOnUIThread();
	return Path.GetFileNameWithoutExtension(document.FullName);
	}

for a file called Index.cshtml.cs would return Index.cshtml but the actual class name is IndexModel.

[DrewBrasher]

I created pull request #40 to add support for this.