Determine if executable file has any .net dependencies

I would like to determine whether or not a file has any dep开发者_JS百科endencies to the .net framework. The catch: I want to do this without the use of any third party application.

I was hoping there was some hidden method in existence that I could use for this.

Thanks for any help, Evan

---

Something along these lines:

Assembly a = Assembly.LoadFrom(
      pathToAssembly);
   AssemblyName [] an = 
      a.GetReferencedAssemblies();
   foreach (AssemblyName name in an) 
      Console.WriteLine(name.ToString());  

... Courtesy of Determining .NET Assembly and Method References

---

A .NET executable has special fields in its header that you can look for, but even native EXEs can implicitly rely on .NET, say by invoking a COM service that's written in .NET.

---

By nature, a C# application will most likely link against the standard C# libraries. If you are talking about another library, outside of the standard libraries, I don't know if that is possible. What exactly do you mean by 'third party' in this situation?