I needed to figure out how the directory path to the .NET Framework so I could lauch a process (regasm.exe) from an assembly.  You would think that the System.Environment class or the Environment.SpecialFolder enumeration.  Keith Brown posted how you can find it using P/Invoke with mscoree.dll.  Well, instead of making a P/Invoke call, I wanted an easier way to looking for it.  Here's what I came up with:

namespace FrameworkPath
{
    using System;

    class Program
    {
        static void Main(string[] args)
        {
            Type objType = typeof(object);
            string moduleName = objType.Module.FullyQualifiedName;
            string frameworkPath = System.IO.Path.GetDirectoryName(moduleName);

            Console.WriteLine(".NET Framework Path: {0}", frameworkPath);

            Console.Write("Press  to exit.");
            Console.ReadLine();
        }
    }
}

Pretty straight forward.