Inspect the Visual Studio solution and project settings using T4 template code gen.

VSSolutionInspection.tt

<#@ template language="C#" debug="true" hostSpecific="true" #>
<#@ output extension=".cs" #>
<#@ Assembly Name="System.Core.dll" #>
<#@ assembly name="EnvDTE" #>
<#@ Assembly Name="System.Windows.Forms.dll" #>
<#@ Assembly name="System.Configuration"#>
<#@ import namespace="System" #>
<#@ import namespace="System.IO" #>
<#@ import namespace="System.Diagnostics" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Collections" #>
<#@import namespace="System.Collections.Specialized"#>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Configuration" #>
using System;
using System.Configuration;

public class VSSolution
{
  public static string Path
    {
        get
        {
            return @"<#=GetSolutionPath() #>";
        }
    }
}

<#+
	 public EnvDTE.Project GetCurrentProject()  {
  
        IServiceProvider _ServiceProvider = (IServiceProvider)Host;
        if (_ServiceProvider == null)
            throw new Exception("Host property returned unexpected value (null)");
		
        EnvDTE.DTE dte = (EnvDTE.DTE)_ServiceProvider.GetService(typeof(EnvDTE.DTE));
        if (dte == null)
            throw new Exception("Unable to retrieve EnvDTE.DTE");
		
        Array activeSolutionProjects = (Array)dte.ActiveSolutionProjects;
        if (activeSolutionProjects == null)
            throw new Exception("DTE.ActiveSolutionProjects returned null");
		
        EnvDTE.Project dteProject = (EnvDTE.Project)activeSolutionProjects.GetValue(0);
        if (dteProject == null)
            throw new Exception("DTE.ActiveSolutionProjects[0] returned null");
		
        return dteProject;

    }

	private string GetProjectPath()
    {
        EnvDTE.Project project = GetCurrentProject();
        System.IO.FileInfo info = new System.IO.FileInfo(project.FullName);
        return info.Directory.FullName;
	}

	private string GetSolutionPath()
    {
        EnvDTE.Project project = GetCurrentProject();
        System.IO.FileInfo info = new System.IO.FileInfo(project.FullName);
        return System.IO.Directory.GetParent(info.Directory.FullName).FullName;
	}

	private string GetConfigPath()
    {
        EnvDTE.Project project = GetCurrentProject();
        foreach (EnvDTE.ProjectItem item in project.ProjectItems)
        {
            // if it is the app.config file, then open it up
            if (item.Name.Equals("App.config",StringComparison.InvariantCultureIgnoreCase) || item.Name.Equals("Web.config",StringComparison.InvariantCultureIgnoreCase))
				return GetProjectPath() + "\\" + item.Name;
        }
        return String.Empty;
    }
    
    public string GetDataDirectory(){
        EnvDTE.Project project=GetCurrentProject();
        return System.IO.Path.GetDirectoryName(project.FileName)+"\\App_Data\\";
    }     
      
#>