How to know the time elapsed during a method invocation?

As a response to this question I writed an extension to extend the Object class, the code is as follow

using System;
using System.Reflection;
using System.Diagnostics;
using System.Collections.Generic;

namespace Extension
{
  static public class ObjectExtension
  {
    static public TimeSpan MesurePeriodeExecution(this object o, 

Assembly assembly,

string typeinstance,

string methode, params object[] parametres)
    {
      Type t = assembly.GetType(typeinstance, true, true);
      List<Type> listetypes = new List<Type>();
      foreach (var item in parametres)
      {
        listetypes.Add(item.GetType());
      }
      object instance = Activator.CreateInstance(t);
      MethodInfo m = t.GetMethod(methode,listetypes.ToArray());
      Stopwatch stopWatch = new Stopwatch();
      if (m.IsStatic)
      {
        stopWatch.Start();
        m.Invoke(null, parametres);
        stopWatch.Stop();  
      }
      else 
      {
        stopWatch.Start();
        m.Invoke(instance, parametres);
        stopWatch.Stop();  
      }  
      return stopWatch.Elapsed;
    }
    
  }
}

Of Corse, this takes only instance and static non generic methods,

you could extend this code to include generic methods