VisualStudioProjectPostProcess.cs

using System;
using UnityEditor;
using System.IO;
using System.Linq;
using System.Xml.Linq;

public class VisualStudioProjectPostProcess : AssetPostprocessor {
    public static void OnGeneratedCSProjectFiles() {
	    GenerateSoultion();
    }

    [MenuItem("Visual Studio/Generate Soultion")]
    public static void GenerateSoultion() {
    	string currentDir = Directory.GetCurrentDirectory();
        string[] projects = Directory.GetFiles(currentDir, "*.csproj").Where(proj => !proj.Contains("VisualStudio")).ToArray();

	    foreach (var file in projects) {
                ProcessProject(file);
	    }

        foreach (var file in Directory.GetFiles(currentDir, "*.sln")) {
            if (!file.Contains("VisualStudio"))
                ProcessSoultion(file, projects);
        }
    }

    private static void ProcessSoultion(string file, string[] projects) {
        string slnFile = File.ReadAllText(file);
        foreach (var project in projects) {
            string projectName = Path.GetFileName(project);
            slnFile = slnFile.Replace(projectName, "VisualStudio." + projectName);
        }
        string newFile = Path.Combine(Path.GetDirectoryName(file), "VisualStudio." + Path.GetFileName(file));
        File.WriteAllText(newFile, slnFile);
    }

    private static void ProcessProject(string file) {
        XNamespace ns = "http://schemas.microsoft.com/developer/msbuild/2003";
        XDocument csproj = XDocument.Load(file);
        var hints = csproj.Descendants(ns + "HintPath");
        foreach (var hint in hints) {
            if (hint.Value.Contains("Unity.app")) {
                CopyAssembly(hint.Value);
                string winPath = String.Format("Library\\UnityAssemblies\\{0}", Path.GetFileName(hint.Value));
                hint.Value = winPath;
            }
        }
        string newFile = Path.Combine(Path.GetDirectoryName(file), "VisualStudio." + Path.GetFileName(file));
        csproj.Save(newFile);
    }

    private static void CopyAssembly(string path) {
    	var unityAssembliesPath = Path.Combine(Directory.GetCurrentDirectory(), "Library/UnityAssemblies/");
        if(!Directory.Exists(unityAssembliesPath))
            Directory.CreateDirectory(unityAssembliesPath);
        string newPath = Path.Combine(Directory.GetCurrentDirectory(), String.Format("Library/UnityAssemblies/{0}", Path.GetFileName(path)));
        File.Copy(path, newPath, true);

        if (File.Exists(path + ".mdb")) {
            string mdbPath = newPath + ".mdb";
            File.Copy(path + ".mdb", mdbPath, true);

        }

        if (File.Exists(Path.GetFileNameWithoutExtension(path) + ".xml")) {
            string xmlPath = Path.GetFileNameWithoutExtension(newPath) + ".xml";
            File.Copy(Path.GetFileNameWithoutExtension(path) + ".xml", xmlPath, true);
        }
    }
}