HOWTO: Get information about the loaded solution from a Visual Studio package.

Author: Carlos J. Quintero (Microsoft MVP) Applies to: Microsoft Visual Studio 2010
Date: July 2014   Microsoft Visual Studio 2012
      Microsoft Visual Studio 2013

This article explains how to get information about properties of the loaded solution from a Visual Studio package.

More Information

Although you can get an instance of the automation EnvDTE.DTE object from a package as explained in the article HOWTO: Get an EnvDTE.DTE instance from a Visual Studio package, and then use DTE.Solution to get its properties (such as Solution.IsOpen, Solution.FullName, Solution.Properties, etc.), you can get information in a native way (without automation objects) using the Microsoft.VisualStudio.Shell.Interop.IVsSolution interface of the Microsoft.VisualStudio.Shell.Interop.SVsSolution service and its GetProperty method with the enum values provided by __VSPROPID enumeration.

The following package sample shows how to get some properties of the loaded solution (if any):

Language: C#   Copy Code Copy Code (IE only)
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.OLE.Interop;
using Microsoft.VisualStudio.Shell;

namespace Company.MyVSPackage
   // Only load the package if there is a solution loaded
   [PackageRegistration(UseManagedResourcesOnly = true)]
   [InstalledProductRegistration("#110", "#112", "1.0", IconResourceID = 400)]
   public sealed class MyVSPackagePackage : Package
      public MyVSPackagePackage()

      protected override void Initialize()


      private void ShowSolutionProperties()
         SVsSolution solutionService;
         IVsSolution solutionInterface;
         bool isSolutionOpen;
         string solutionDirectory;
         string solutionFullFileName;
         int projectCount;

         // Get the Solution service
         solutionService = (SVsSolution)this.GetService(typeof(SVsSolution));

         // Get the Solution interface of the Solution service
         solutionInterface = solutionService as IVsSolution;

         // Get some properties

         isSolutionOpen = GetPropertyValue<bool>(solutionInterface, __VSPROPID.VSPROPID_IsSolutionOpen);
         MessageBox.Show("Is Solution Open: " + isSolutionOpen);

         if (isSolutionOpen)
            solutionDirectory = GetPropertyValue<string>(solutionInterface, __VSPROPID.VSPROPID_SolutionDirectory);
            MessageBox.Show("Solution directory: " + solutionDirectory);

            solutionFullFileName = GetPropertyValue<string>(solutionInterface, __VSPROPID.VSPROPID_SolutionFileName);
            MessageBox.Show("Solution full file name: " + solutionFullFileName);

            projectCount = GetPropertyValue<int>(solutionInterface, __VSPROPID.VSPROPID_ProjectCount);
            MessageBox.Show("Project count: " + projectCount.ToString());

      private T GetPropertyValue<T>(IVsSolution solutionInterface, __VSPROPID solutionProperty)
         object value = null;
         T result = default(T);

         if (solutionInterface.GetProperty((int)solutionProperty, out value) == Microsoft.VisualStudio.VSConstants.S_OK)
            result = (T)value;
         return result;

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