NetworkBuilder.cs

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Diagnostics;

public class NetworkBuilder 
{
    [MenuItem("Networking/Build and Run Server %#x")]
    public static void BuildAndRunServer()
    {
        Build("SirServer");
        Run("SirServer", "-Server -Port 3435");
    }

    [MenuItem("Networking/Build and Run Client")]
    public static void BuildAndRunClient()
    {
        Build("SirClient");
        Run("SirClient", "-Client -IP 127.0.0.1 -Port 3435");
    }

    // SHORTCUT Control+Shift+C
    [MenuItem("Networking/Build Client %#c")]
    public static void BuildClient()
    {
        Build("SirClient");
    }

    // SHORTCUT Control+Shift+V
    [MenuItem("Networking/Run Client %#v")]
    public static void RunClient()
    {
        Run("SirClient", "-Client -IP 127.0.0.1 -Port 3435");
    }

    private static Process Run(string buildName, string args = "")
    {
        return Process.Start
            (
                new ProcessStartInfo() 
                { 
                    FileName = @"D:/UnityBuilds/" + buildName+"/" + buildName +".exe",
                    Arguments = args
                }
            );
    }

    private static void Build(string buildName)
    {
                                  // this is an array of allthe scenes you want in the bild                                             // target platform....
        BuildPipeline.BuildPlayer(new[] { "Assets/Scenes/GameScene.unity" }, @"D:/UnityBuilds/" + buildName + "/" + buildName + ".exe", BuildTarget.StandaloneWindows, BuildOptions.Development | BuildOptions.AllowDebugging);
                                  //                                          This is the path where you want it save                                                   // and make the build debugable!
    }
}