How to run all your NUnit tests in a solution in Visual Studio

//-------------------------------------------------------------------------------------
// <copyright file='Settings1.Designer.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.AddIns.NunitHelper
{
    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "9.0.0.0")]
    public sealed partial class Settings1 : global::System.Configuration.ApplicationSettingsBase
    {
        private static Settings1 defaultInstance = ((Settings1)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings1())));

        public static Settings1 Default
        {
            get
            {
                return defaultInstance;
            }
        }

        [global::System.Configuration.UserScopedSettingAttribute()]
        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
        [global::System.Configuration.DefaultSettingValueAttribute("C:\\Program Files\\NUnit 2.5.2\\bin\\net-2.0\\nunit.exe")]
        public string NunitLocation
        {
            get
            {
                return ((string)(this["NunitLocation"]));
            }
            set
            {
                this["NunitLocation"] = value;
            }
        }
    }
}