How to quickly debug a NUnit test in Visual Studio

//-------------------------------------------------------------------------------------
// <copyright file='AssemblyHelper.cs' company='Jonno'>
//     Copyright (c) Paul Johnson 2009 (email:paulmichael.johnson@gmail.com)
//     Code is released under The Code Project Open License (CPOL).
// </copyright>
//-------------------------------------------------------------------------------------

namespace Jonno.Utilities
{
    using System.Reflection;
    using Jonno.Extensions;

    /// <summary>
    /// Functions that help with Assembly manipulation.     
    /// </summary>
    public static class AssemblyHelper
    {
        /// <summary>
        /// Gets the folder the assembly is executing in.
        /// </summary>
        /// <param name="assembly">The assembly to convert the path for.</param>
        /// <returns>The folder.</returns>
        public static string GetAssemblyFolderName(Assembly assembly)
        {
            var folder = assembly.Location;
            if (folder == null)
            {
                return string.Empty;
            }
            
            var lastSlash = folder.LastIndexOf(System.IO.Path.DirectorySeparatorChar) + 1;
            return folder.Left(lastSlash);            
        }
    }
}