http://arex1338.wordpress.com/2013/07/06/how-to-do-something-whenever-an-assertion-fails/

gistfile1.cs

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
	
namespace SomeNamespace
{
    [TestClass]
    public class BaseTest
    {
	
	public TestContext TestContext { get; set; }
	
        [TestInitialize]
        public void BaseTestInitialize()
        {
            
        }

        [TestCleanup]
        public void BaseTestCleanup()
        {
            if (this.TestContext.CurrentTestOutcome == UnitTestOutcome.Failed)
            {
                // Do something
            }
        }
    }
}