Parsing Visual Studio Solution files

How can I parse Visual Studio solution (SLN) files in .NET? I would like to write an app that merges multiple solutions into one while saving the relative build order.

The .NET 4.0 version of the Microsoft.Build assembly contains a SolutionParser class in the Microsoft.Build.Construction namespace that parses Visual Studio solution files.

Unfortunately this class is internal, but I've wrapped some of that functionality in a class that uses reflection to get at some common properties you might find helpful.

public class Solution
{
    //internal class SolutionParser
    //Name: Microsoft.Build.Construction.SolutionParser
    //Assembly: Microsoft.Build, Version=4.0.0.0

    static readonly Type s_SolutionParser;
    static readonly PropertyInfo s_SolutionParser_solutionReader;
    static readonly MethodInfo s_SolutionParser_parseSolution;
    static readonly PropertyInfo s_SolutionParser_projects;

    static Solution()
    {
        s_SolutionParser = Type.GetType("Microsoft.Build.Construction.SolutionParser, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);
        if (s_SolutionParser != null)
        {
            s_SolutionParser_solutionReader = s_SolutionParser.GetProperty("SolutionReader", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_projects = s_SolutionParser.GetProperty("Projects", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_parseSolution = s_SolutionParser.GetMethod("ParseSolution", BindingFlags.NonPublic | BindingFlags.Instance);
        }
    }

    public List<SolutionProject> Projects { get; private set; }

    public Solution(string solutionFileName)
    {
        if (s_SolutionParser == null)
        {
            throw new InvalidOperationException("Can not find type 'Microsoft.Build.Construction.SolutionParser' are you missing a assembly reference to 'Microsoft.Build.dll'?");
        }
        var solutionParser = s_SolutionParser.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic).First().Invoke(null);
        using (var streamReader = new StreamReader(solutionFileName))
        {
            s_SolutionParser_solutionReader.SetValue(solutionParser, streamReader, null);
            s_SolutionParser_parseSolution.Invoke(solutionParser, null);
        }
        var projects = new List<SolutionProject>();
        var array = (Array)s_SolutionParser_projects.GetValue(solutionParser, null);
        for (int i = 0; i < array.Length; i++)
        {
            projects.Add(new SolutionProject(array.GetValue(i)));
        }
        this.Projects = projects;
    }
}

[DebuggerDisplay("{ProjectName}, {RelativePath}, {ProjectGuid}")]
public class SolutionProject
{
    static readonly Type s_ProjectInSolution;
    static readonly PropertyInfo s_ProjectInSolution_ProjectName;
    static readonly PropertyInfo s_ProjectInSolution_RelativePath;
    static readonly PropertyInfo s_ProjectInSolution_ProjectGuid;
    static readonly PropertyInfo s_ProjectInSolution_ProjectType;

    static SolutionProject()
    {
        s_ProjectInSolution = Type.GetType("Microsoft.Build.Construction.ProjectInSolution, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);
        if (s_ProjectInSolution != null)
        {
            s_ProjectInSolution_ProjectName = s_ProjectInSolution.GetProperty("ProjectName", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_RelativePath = s_ProjectInSolution.GetProperty("RelativePath", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_ProjectGuid = s_ProjectInSolution.GetProperty("ProjectGuid", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_ProjectType = s_ProjectInSolution.GetProperty("ProjectType", BindingFlags.NonPublic | BindingFlags.Instance);
        }
    }

    public string ProjectName { get; private set; }
    public string RelativePath { get; private set; }
    public string ProjectGuid { get; private set; }
    public string ProjectType { get; private set; }

    public SolutionProject(object solutionProject)
    {
        this.ProjectName = s_ProjectInSolution_ProjectName.GetValue(solutionProject, null) as string;
        this.RelativePath = s_ProjectInSolution_RelativePath.GetValue(solutionProject, null) as string;
        this.ProjectGuid = s_ProjectInSolution_ProjectGuid.GetValue(solutionProject, null) as string;
        this.ProjectType = s_ProjectInSolution_ProjectType.GetValue(solutionProject, null).ToString();
    }
}

Note that you have to change your target framework to ".NET Framework 4" (not client profile) to be able to add the Microsoft.Build reference to your project.

With Visual Studio 2015 there is now a publicly accessible SolutionFile class which can be used to parse solution files:

using Microsoft.Build.Construction;
var _solutionFile = SolutionFile.Parse(path);

This class is found in the Microsoft.Build.dll 14.0.0.0 assembly. In my case it was located at:

C:\Program Files (x86)\Reference Assemblies\Microsoft\MSBuild\v14.0\Microsoft.Build.dll

Thanks to Phil for pointing this out!

I don't know if anyone is still looking for solutions to this problem, but I ran across a project that seems to do just what is needed.

https://slntools.codeplex.com/ was migrated to https://github.com/mtherien/slntools

One of the functions of this tool is to merge multiple solutions together.

JetBrains (the creators of Resharper) have public sln parsing abilities in their assemblies (no reflection needed). It's probably more robust than the existing open source solutions suggested here (let alone the ReGex hacks). All you need to do is:

• Download the ReSharper Command Line Tools (free).
• Add the following as references to your project
  • JetBrains.Platform.ProjectModel
  • JetBrains.Platform.Util
  • JetBrains.Platform.Interop.WinApi

The library is not documented, but Reflector (or indeed, dotPeek) is your friend. For example:

public static void PrintProjects(string solutionPath)
{
	var slnFile = SolutionFileParser.ParseFile(FileSystemPath.Parse(solutionPath));
	foreach (var project in slnFile.Projects)
	{
		Console.WriteLine(project.ProjectName);
		Console.WriteLine(project.ProjectGuid);
		Console.WriteLine(project.ProjectTypeGuid);
		foreach (var kvp in project.ProjectSections)
		{
			Console.WriteLine(kvp.Key);
			foreach (var projectSection in kvp.Value) 
			{
				Console.WriteLine(projectSection.SectionName);
				Console.WriteLine(projectSection.SectionValue);
				foreach (var kvpp in projectSection.Properties)
				{
					Console.WriteLine(kvpp.Key); 
					Console.WriteLine(string.Join(",", kvpp.Value));
				}
			}
		}
	}
}

I can't really offer you a library and my guess is there isn't one that exists out there. But I've spent a deal of time messing around with .sln files in batch editting scenarios and I've found Powershell to be a very useful tool for this task. The .SLN format is pretty simple and can be almost completely parsed with a few quick and dirty expressions. For Example

Included Project files.

gc ConsoleApplication30.sln | 
  ? { $_ -match "^Project" } | 
  %{ $_ -match ".*=(.*)$" | out-null ; $matches[1] } | 
  %{ $_.Split(",")[1].Trim().Trim('"') }

It's not always pretty, but it is an effective way to do batch processing.

we solved a similar problem of merging solutions automatically by writing a Visual Studio plugin which created a new solution then searched for *.sln file and imported them into the new one using:

dte2.Solution.AddFromFile(solutionPath, false);

Our problem was slightly different in that we wanted VS to sort out the build order for us, so we then converted any dll references to project references where possible.

We then automated this into a build process by running VS via COM automation.

This solution was a little Heath Robinson, but had the advantage that VS was doing the editing so our code was not dependant on format of the sln file. Which was helpful when we moved from VS 2005 to 2008 and again to 2010.

Everything is great, but I wanted also to get sln generation capability - in code snapshot above you're only parsing .sln files - I wanted to make similar thing except to be able to re-generate sln with slight modifications back to .sln file. Such cases could be for example porting same project for different .NET platform. For now it's only sln re-generation, but later on I will expand it to projects as well.

I guess that I wanted also to demonstrate the power of regular expressions and native interfaces. (Smaller amount of code with more functionality)

Update 4.1.2017 I've created separate svn repository for parsing .sln solution: https://sourceforge.net/p/syncproj/code/HEAD/tree/

Below is my own code sample snippet (predecessor). You're free to use any of them.

It's possible that in future svn based solution parsing code will be update with generation capabilities as well.

Update 4.2.2017 Source code in SVN is supporting .sln generation as well.

using System;
using System.Linq;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics;
using System.Text.RegularExpressions;
using System.Text;


public class Program
{
    [DebuggerDisplay("{ProjectName}, {RelativePath}, {ProjectGuid}")]
    public class SolutionProject
    {
        public string ParentProjectGuid;
        public string ProjectName;
        public string RelativePath;
        public string ProjectGuid;

        public string AsSlnString()
        { 
            return "Project(\"" + ParentProjectGuid + "\") = \"" + ProjectName + "\", \"" + RelativePath + "\", \"" + ProjectGuid + "\"";
        }
    }

/// <summary>
/// .sln loaded into class.
/// </summary>
public class Solution
{
    public List<object> slnLines;       // List of either String (line format is not intresting to us), or SolutionProject.

    /// <summary>
    /// Loads visual studio .sln solution
    /// </summary>
    /// <param name="solutionFileName"></param>
    /// <exception cref="System.IO.FileNotFoundException">The file specified in path was not found.</exception>
    public Solution( string solutionFileName )
    {
        slnLines = new List<object>();
        String slnTxt = File.ReadAllText(solutionFileName);
        string[] lines = slnTxt.Split('\n');
        //Match string like: Project("{66666666-7777-8888-9999-AAAAAAAAAAAA}") = "ProjectName", "projectpath.csproj", "{11111111-2222-3333-4444-555555555555}"
        Regex projMatcher = new Regex("Project\\(\"(?<ParentProjectGuid>{[A-F0-9-]+})\"\\) = \"(?<ProjectName>.*?)\", \"(?<RelativePath>.*?)\", \"(?<ProjectGuid>{[A-F0-9-]+})");

        Regex.Replace(slnTxt, "^(.*?)[\n\r]*$", new MatchEvaluator(m =>
            {
                String line = m.Groups[1].Value;

                Match m2 = projMatcher.Match(line);
                if (m2.Groups.Count < 2)
                {
                    slnLines.Add(line);
                    return "";
                }

                SolutionProject s = new SolutionProject();
                foreach (String g in projMatcher.GetGroupNames().Where(x => x != "0")) /* "0" - RegEx special kind of group */
                    s.GetType().GetField(g).SetValue(s, m2.Groups[g].ToString());

                slnLines.Add(s);
                return "";
            }), 
            RegexOptions.Multiline
        );
    }

    /// <summary>
    /// Gets list of sub-projects in solution.
    /// </summary>
    /// <param name="bGetAlsoFolders">true if get also sub-folders.</param>
    public List<SolutionProject> GetProjects( bool bGetAlsoFolders = false )
    {
        var q = slnLines.Where( x => x is SolutionProject ).Select( i => i as SolutionProject );
    
        if( !bGetAlsoFolders )  // Filter away folder names in solution.
            q = q.Where( x => x.RelativePath != x.ProjectName );
    
        return q.ToList();
    }

    /// <summary>
    /// Saves solution as file.
    /// </summary>
    public void SaveAs( String asFilename )
    {
        StringBuilder s = new StringBuilder();

        for( int i = 0; i < slnLines.Count; i++ )
        {
            if( slnLines[i] is String ) 
                s.Append(slnLines[i]);
            else
                s.Append((slnLines[i] as SolutionProject).AsSlnString() );

            if( i != slnLines.Count )
                s.AppendLine();
        }

        File.WriteAllText(asFilename, s.ToString());
    }
}


    static void Main()
    {
        String projectFile = @"yourown.sln";

        try
        {
            String outProjectFile = Path.Combine(Path.GetDirectoryName(projectFile), Path.GetFileNameWithoutExtension(projectFile) + "_2.sln");
            Solution s = new Solution(projectFile);
            foreach( var proj in s.GetProjects() )
            {
                Console.WriteLine( proj.RelativePath );
            }

            SolutionProject p = s.GetProjects().Where( x => x.ProjectName.Contains("Plugin") ).First();
            p.RelativePath = Path.Combine( Path.GetDirectoryName(p.RelativePath) , Path.GetFileNameWithoutExtension(p.RelativePath) + "_Variation" + ".csproj");

            s.SaveAs(outProjectFile);

        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}

I expounded, determined that the MSBuild classes can be used to manipulate the underlying structures. I will have further code on my web site later.

// VSSolution

using System;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;
using System.Diagnostics;
using System.IO;
using AbstractX.Contracts;

namespace VSProvider
{
    public class VSSolution : IVSSolution
    {
        //internal class SolutionParser 
        //Name: Microsoft.Build.Construction.SolutionParser 
        //Assembly: Microsoft.Build, Version=4.0.0.0 

        static readonly Type s_SolutionParser;
        static readonly PropertyInfo s_SolutionParser_solutionReader;
        static readonly MethodInfo s_SolutionParser_parseSolution;
        static readonly PropertyInfo s_SolutionParser_projects;
        private string solutionFileName;
        private List<VSProject> projects;

        public string Name
        {
            get
            {
                return Path.GetFileNameWithoutExtension(solutionFileName);
            }
        }

        public IEnumerable<IVSProject> Projects
        {
            get
            {
                return projects;
            }
        }

        static VSSolution()
        {
            s_SolutionParser = Type.GetType("Microsoft.Build.Construction.SolutionParser, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);
            s_SolutionParser_solutionReader = s_SolutionParser.GetProperty("SolutionReader", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_projects = s_SolutionParser.GetProperty("Projects", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_parseSolution = s_SolutionParser.GetMethod("ParseSolution", BindingFlags.NonPublic | BindingFlags.Instance);
        }

        public string SolutionPath
        {
            get
            {
                var file = new FileInfo(solutionFileName);

                return file.DirectoryName;
            }
        }

        public VSSolution(string solutionFileName)
        {
            if (s_SolutionParser == null)
            {
                throw new InvalidOperationException("Can not find type 'Microsoft.Build.Construction.SolutionParser' are you missing a assembly reference to 'Microsoft.Build.dll'?");
            }

            var solutionParser = s_SolutionParser.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic).First().Invoke(null);

            using (var streamReader = new StreamReader(solutionFileName))
            {
                s_SolutionParser_solutionReader.SetValue(solutionParser, streamReader, null);
                s_SolutionParser_parseSolution.Invoke(solutionParser, null);
            }

            this.solutionFileName = solutionFileName;

            projects = new List<VSProject>();
            var array = (Array)s_SolutionParser_projects.GetValue(solutionParser, null);

            for (int i = 0; i < array.Length; i++)
            {
                projects.Add(new VSProject(this, array.GetValue(i)));
            }
        }

        public void Dispose()
        {
        }
    }
}

// VSProject

using System;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;
using System.Diagnostics;
using System.IO;
using System.Xml;
using AbstractX.Contracts;
using System.Collections;

namespace VSProvider
{
    [DebuggerDisplay("{ProjectName}, {RelativePath}, {ProjectGuid}")]
    public class VSProject : IVSProject
    {
        static readonly Type s_ProjectInSolution;
        static readonly Type s_RootElement;
        static readonly Type s_ProjectRootElement;
        static readonly Type s_ProjectRootElementCache;
        static readonly PropertyInfo s_ProjectInSolution_ProjectName;
        static readonly PropertyInfo s_ProjectInSolution_ProjectType;
        static readonly PropertyInfo s_ProjectInSolution_RelativePath;
        static readonly PropertyInfo s_ProjectInSolution_ProjectGuid;
        static readonly PropertyInfo s_ProjectRootElement_Items;

        private VSSolution solution;
        private string projectFileName;
        private object internalSolutionProject;
        private List<VSProjectItem> items;
        public string Name { get; private set; }
        public string ProjectType { get; private set; }
        public string RelativePath { get; private set; }
        public string ProjectGuid { get; private set; }

        public string FileName
        {
            get
            {
                return projectFileName;
            }
        }

        static VSProject()
        {
            s_ProjectInSolution = Type.GetType("Microsoft.Build.Construction.ProjectInSolution, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);

            s_ProjectInSolution_ProjectName = s_ProjectInSolution.GetProperty("ProjectName", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_ProjectType = s_ProjectInSolution.GetProperty("ProjectType", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_RelativePath = s_ProjectInSolution.GetProperty("RelativePath", BindingFlags.NonPublic | BindingFlags.Instance);
            s_ProjectInSolution_ProjectGuid = s_ProjectInSolution.GetProperty("ProjectGuid", BindingFlags.NonPublic | BindingFlags.Instance);

            s_ProjectRootElement = Type.GetType("Microsoft.Build.Construction.ProjectRootElement, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);
            s_ProjectRootElementCache = Type.GetType("Microsoft.Build.Evaluation.ProjectRootElementCache, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);

            s_ProjectRootElement_Items = s_ProjectRootElement.GetProperty("Items", BindingFlags.Public | BindingFlags.Instance);
        }

        public IEnumerable<IVSProjectItem> Items
        {
            get
            {
                return items;
            }
        }

        public VSProject(VSSolution solution, object internalSolutionProject)
        {
            this.Name = s_ProjectInSolution_ProjectName.GetValue(internalSolutionProject, null) as string;
            this.ProjectType = s_ProjectInSolution_ProjectType.GetValue(internalSolutionProject, null).ToString();
            this.RelativePath = s_ProjectInSolution_RelativePath.GetValue(internalSolutionProject, null) as string;
            this.ProjectGuid = s_ProjectInSolution_ProjectGuid.GetValue(internalSolutionProject, null) as string;

            this.solution = solution;
            this.internalSolutionProject = internalSolutionProject;

            this.projectFileName = Path.Combine(solution.SolutionPath, this.RelativePath);

            items = new List<VSProjectItem>();

            if (this.ProjectType == "KnownToBeMSBuildFormat")
            {
                this.Parse();
            }
        }

        private void Parse()
        {
            var stream = File.OpenRead(projectFileName);
            var reader = XmlReader.Create(stream);
            var cache = s_ProjectRootElementCache.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic).First().Invoke(new object[] { true });
            var rootElement = s_ProjectRootElement.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic).First().Invoke(new object[] { reader, cache });

            stream.Close();

            var collection = (ICollection)s_ProjectRootElement_Items.GetValue(rootElement, null);

            foreach (var item in collection)
            {
                items.Add(new VSProjectItem(this, item));
            }

        }

        public IEnumerable<IVSProjectItem> EDMXModels
        {
            get 
            {
                return this.items.Where(i => i.ItemType == "EntityDeploy");
            }
        }

        public void Dispose()
        {
        }
    }
}

// VSProjectItem

using System;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;
using System.Diagnostics;
using System.IO;
using System.Xml;
using AbstractX.Contracts;

namespace VSProvider
{
    [DebuggerDisplay("{ProjectName}, {RelativePath}, {ProjectGuid}")]
    public class VSProjectItem : IVSProjectItem
    {
        static readonly Type s_ProjectItemElement;
        static readonly PropertyInfo s_ProjectItemElement_ItemType;
        static readonly PropertyInfo s_ProjectItemElement_Include;

        private VSProject project;
        private object internalProjectItem;
        private string fileName;

        static VSProjectItem()
        {
            s_ProjectItemElement = Type.GetType("Microsoft.Build.Construction.ProjectItemElement, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);

            s_ProjectItemElement_ItemType = s_ProjectItemElement.GetProperty("ItemType", BindingFlags.Public | BindingFlags.Instance);
            s_ProjectItemElement_Include = s_ProjectItemElement.GetProperty("Include", BindingFlags.Public | BindingFlags.Instance);
        }

        public string ItemType { get; private set; }
        public string Include { get; private set; }

        public VSProjectItem(VSProject project, object internalProjectItem)
        {
            this.ItemType = s_ProjectItemElement_ItemType.GetValue(internalProjectItem, null) as string;
            this.Include = s_ProjectItemElement_Include.GetValue(internalProjectItem, null) as string;
            this.project = project;
            this.internalProjectItem = internalProjectItem;

            // todo - expand this

            if (this.ItemType == "Compile" || this.ItemType == "EntityDeploy")
            {
                var file = new FileInfo(project.FileName);

                fileName = Path.Combine(file.DirectoryName, this.Include);
            }
        }

        public byte[] FileContents
        {
            get 
            {
                return File.ReadAllBytes(fileName);
            }
        }

        public string Name
        {
            get 
            {
                if (fileName != null)
                {
                    var file = new FileInfo(fileName);

                    return file.Name;
                }
                else
                {
                    return this.Include;
                }
            }
        }
    }
}

Answer by @john-leidegren is great. For pre-VS2015, this is of great use. But there was a minor mistake, as the code to retrieve configurations was missing. So wanted to add it, in case someone is struggling to use this code.
The enhancement is very simple:

    public class Solution
{
    //internal class SolutionParser
    //Name: Microsoft.Build.Construction.SolutionParser
    //Assembly: Microsoft.Build, Version=4.0.0.0

    static readonly Type s_SolutionParser;
    static readonly PropertyInfo s_SolutionParser_solutionReader;
    static readonly MethodInfo s_SolutionParser_parseSolution;
    static readonly PropertyInfo s_SolutionParser_projects;
    static readonly PropertyInfo s_SolutionParser_configurations;//this was missing in john's answer


    static Solution()
    {
        s_SolutionParser = Type.GetType("Microsoft.Build.Construction.SolutionParser, Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", false, false);
        if ( s_SolutionParser != null )
        {
            s_SolutionParser_solutionReader = s_SolutionParser.GetProperty("SolutionReader", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_projects = s_SolutionParser.GetProperty("Projects", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_parseSolution = s_SolutionParser.GetMethod("ParseSolution", BindingFlags.NonPublic | BindingFlags.Instance);
            s_SolutionParser_configurations = s_SolutionParser.GetProperty("SolutionConfigurations", BindingFlags.NonPublic | BindingFlags.Instance); //this was missing in john's answer

            // additional info:
            var PropNameLst = GenHlp_PropBrowser.PropNamesOfType(s_SolutionParser);
            // the above call would yield something like this:
            // [ 0]	"SolutionParserWarnings"	    string
            // [ 1]	"SolutionParserComments"	    string
            // [ 2]	"SolutionParserErrorCodes"	    string
            // [ 3]	"Version"	                    string
            // [ 4]	"ContainsWebProjects"	        string
            // [ 5]	"ContainsWebDeploymentProjects"	string
            // [ 6]	"ProjectsInOrder"	            string
            // [ 7]	"ProjectsByGuid"	            string
            // [ 8]	"SolutionFile"	                string
            // [ 9]	"SolutionFileDirectory"	        string
            // [10]	"SolutionReader"	            string
            // [11]	"Projects"	                    string
            // [12]	"SolutionConfigurations"	    string
        }
    }

    public List<SolutionProject> Projects { get; private set; }
    public List<SolutionConfiguration> Configurations { get; private set; }

   //...
   //...
   //... no change in the rest of the code
}

As additional help, providing simple code to browse through the properties of a System.Type as suggested by @oasten.

public class GenHlp_PropBrowser
{
    public static List<string> PropNamesOfClass(object anObj)
    {
        return anObj == null ? null : PropNamesOfType(anObj.GetType());
    }
    public static List<String> PropNamesOfType(System.Type aTyp)
    {
        List<string> retLst = new List<string>();
        foreach ( var p in aTyp.GetProperties(BindingFlags.NonPublic | BindingFlags.Instance) )
        {
            retLst.Add(p.Name);
        }
        return retLst;
    }
}

Thank @John Leidegren he offers an effective way. I write a hlper class for I cant use his code that cant find the s_SolutionParser_configurations and the projects without FullName.

The code is in github that can get the projects with the FullName.

And the code cant get SolutionConfiguration.

But when you dev a vsx the vs will say cant find Microsoft.Build.dll ,so you may try use dte to get all the projects.

The code that use dte to get all the projects is in github

For what its worth I have now created a little project to read sln and proj files available on nuget:

https://www.nuget.org/packages/ByteDev.DotNet/