How to return a generic object in c# create objects

public static Object create(String className, String[] params)
  {
      Object o = null;
      Assembly asm = Assembly.GetExecutingAssembly();
      Type t = asm.GetType(className);
      int l = params.Length;
      switch (l)
      {
          case 0:
              o = Activator.CreateInstance(t);
              break;
          case 1:
              o = Activator.CreateInstance(t, params[0]);
              break;
          case 2:
              o = Activator.CreateInstance(t, params[0], params[1]);
              break;
          case 3:
              o = Activator.CreateInstance(t, params[0], params[1], params[2]);
              break;
          case 4:
              o = Activator.CreateInstance(t, params[0], params[1], params[2], params[3]);
              break;
          case 5:
              o = Activator.CreateInstance(t, params[0], params[1], params[2], params[3], params[