Get Development Server VPath And Port From Project File

private static void GetDevelopmentServerVPathAndPortFromProjectFile(
   string csprojFileName,
   out string developmentServerVPath,
   out int developmentServerPort)
{
   XPathDocument doc = new XPathDocument(csprojFileName);
   XPathNavigator navigator = doc.CreateNavigator();

   XmlNamespaceManager manager = new XmlNamespaceManager(navigator.NameTable);
   manager.AddNamespace("msbuild",
       "http://schemas.microsoft.com/developer/msbuild/2003");

   const string xpath = "/msbuild:Project/msbuild:ProjectExtensions/"
                      + "msbuild:VisualStudio/msbuild:FlavorProperties/"
                      + "msbuild:WebProjectProperties";

   XPathNavigator webProjectPropertiesNode =
       navigator.SelectSingleNode(xpath, manager);
   XPathNavigator developmentServerPortNode =
       webProjectPropertiesNode.SelectSingleNode("msbuild:DevelopmentServerPort",
           manager);
   XPathNavigator developmentServerVPathNode =
       webProjectPropertiesNode.SelectSingleNode("msbuild:DevelopmentServerVPath",
           manager);

   developmentServerPort = developmentServerPortNode.ValueAsInt;
   developmentServerVPath = developmentServerVPathNode.Value;
}

private static string GetCommonProgramFilesPath()
{
   string commonProgramFiles =
       Environment.GetEnvironmentVariable("CommonProgramFiles(x86)");
   if (string.IsNullOrEmpty(commonProgramFiles))
   {
       commonProgramFiles =
           Environment.GetEnvironmentVariable("CommonProgramFiles");
   }
   if (string.IsNullOrEmpty(commonProgramFiles))
   {
       commonProgramFiles =
           Environment.GetFolderPath(Environment.SpecialFolder.CommonProgramFiles);
   }
   return commonProgramFiles;
}

private static Process PrepareCassiniProcess(int developmentServerPort,
                                            string projectPhysicalPath,
                                            string developmentServerVPath)
{
   string commonProgramFiles = GetCommonProgramFilesPath();
   string cassiniPath = Path.Combine(commonProgramFiles,
       @"Microsoft Shared\DevServer\9.0\WebDev.WebServer.exe");
   string cassiniArgs = string.Format(
       CultureInfo.InvariantCulture,
       "/port:{0} /nodirlist /path:\"{1}\" /vpath:\"{2}\"",
       developmentServerPort, projectPhysicalPath, developmentServerVPath);

   Process cassiniProcess = new Process();
   cassiniProcess.StartInfo.FileName = cassiniPath;
   cassiniProcess.StartInfo.Arguments = cassiniArgs;
   return cassiniProcess;
}

// To use it, you need to discover the path to the CSPROJ file of the web
// project under test. I'll leave that as an exercise for the reader

Source : http://stackoverflow.com/questions/328566/starting-asp-net-development-web-server-cassini-as-part-of-unit-test-setup