FancyActionTimer.cs

using System;
using System.Threading;

namespace ConsoleApplication2
{
  class Program
  {
    public static void Main()
    {
      var action = new Action( MethodA).Timed(TimeSpan.FromSeconds(7));
      action.Invoke(); // called
      Thread.Sleep( 5000 );
      action.Invoke(); // not called
      Thread.Sleep( 5000 );
      action.Invoke(); // called
    }

    public static void MethodA()
    {
      Console.WriteLine( "Method A Invoked" );
    }

  }
  public static class ActionExtension
  {
    public static Action Timed( this Action action, TimeSpan interval )
    {
      DateTime lastCalled = DateTime.MinValue;
      return () =>
      {
        if ( DateTime.Now - lastCalled < interval )
          return;
        action.Invoke();
        lastCalled = DateTime.Now;       
      };
    }
  }
}