Unity3d custom window to allow compilation and replacement of custom DLL code

RebuildDll.cs

#if UNITY_EDITOR
using System;
using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Diagnostics;
using UnityEditor;

public class RebuildDll : EditorWindow
{
    //List of .csproj files to build
    List<String> Projects = new List<String> ();

    //Location to place the built dll in the unity project
    String Location = String.Format ("Assets{0}code", Path.DirectorySeparatorChar);

    [MenuItem ("Assets/Tools/Build DLLs")]
    public static void ShowWindow ()
    {
        EditorWindow.GetWindow (typeof(RebuildDll));
    }

    void OnGUI ()
    {
        EditorGUILayout.LabelField ("DLL Location");
        Location = EditorGUILayout.TextField (Location);

        EditorGUILayout.LabelField ("CS Project Files");
        Projects = EditorGUILayout.TextArea (String.Join (Environment.NewLine, Projects.ToArray ()))
            .Split (Environment.NewLine.ToCharArray ()).ToList ();

        if (GUILayout.Button ("Build DLL's")) 
        {
            foreach (String project in Projects) 
            {				
                string fileName = Path.GetFileNameWithoutExtension (project);
                try {
                    Process buildProcess = new Process ();
                    //For non-mono runtimes this should probably use msbuild
                    buildProcess.StartInfo.FileName = "xbuild";
                    buildProcess.StartInfo.Arguments = "/p:Configuration=Release /t:Rebuild " + project;
                    buildProcess.StartInfo.UseShellExecute = false;
                    buildProcess.StartInfo.RedirectStandardOutput = true;
                    buildProcess.StartInfo.RedirectStandardError = true;
                    buildProcess.Start ();
                    string stdOutput = buildProcess.StandardOutput.ReadToEnd ();
                    string errorOutput = buildProcess.StandardError.ReadToEnd ();
                    buildProcess.WaitForExit ();

                    UnityEngine.Debug.Log (stdOutput);
                    if(!String.IsNullOrEmpty(errorOutput))
                        UnityEngine.Debug.LogError (errorOutput);

                    String builtDllLocation = String.Format ("{0}{1}bin{1}Release{1}{2}.dll", Path.GetDirectoryName (project), Path.DirectorySeparatorChar, fileName);

                    if (File.Exists (Location + Path.DirectorySeparatorChar + fileName + ".dll") && File.Exists (builtDllLocation)) 
                    {	
                        File.Replace (builtDllLocation, Location + Path.DirectorySeparatorChar + fileName + ".dll", null);
                        UnityEngine.Debug.Log ("Replaced " + fileName);
                    }
                } catch (Exception e) {
                    EditorUtility.DisplayDialog ("Error building DLL's", e.Message, "OK");
                }
            }
        }
    }
}
#endif