gistfile1.txt

using System;
using EnvDTE;

namespace NuGet.VisualStudio
{
    public static class VsVersionHelper
    {
        private static readonly Lazy<int> _vsMajorVersion = new Lazy<int>(GetMajorVsVersion);
        private static bool _isVS2010;

        public static int VsMajorVersion
        {
            get { return _vsMajorVersion.Value; }
        }

        public static bool IsVisualStudio2010
        {
            get { return VsMajorVersion == 10; }
        }

        private static int GetMajorVsVersion()
        {
            DTE dte = ServiceLocator.GetInstance<DTE>();
            string vsVersion = dte.Version;
            return vsVersion.StartsWith("10", StringComparison.OrdinalIgnoreCase) ? 10 : 11;
        }
    }
}


public IFileSystem GetFileSystem(string path, SourceControlBindings binding)
        {
            // Return null if this this binding isn't for us then return null
            if (ProviderConstants.SupportedVsVersion != VsVersionHelper.VsMajorVersion ||
                String.IsNullOrEmpty(binding.ProviderName) ||
                !binding.ProviderName.Equals(TfsProviderName, StringComparison.OrdinalIgnoreCase))
            {
                return null;
            }

            return GetFileSystemInternal(path, binding);
        }

        private static IFileSystem GetFileSystemInternal(string path, SourceControlBindings binding)
        {
            

            TfsTeamProjectCollection projectCollection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri(binding.ServerName));
            var versionControl = projectCollection.GetService<VersionControlServer>();
            Workspace workspace = versionControl.TryGetWorkspace(binding.LocalBinding);

            return new TfsFileSystem(workspace, path);
        }