VsTeXProject.VisualStudio.Project.ProjectNode.GetComponentPickerDirectories C# (CSharp) Method

        private string GetComponentPickerDirectories()
        {
            var enumFactory = site.GetService(typeof (SCompEnumService)) as IVsComponentEnumeratorFactory4;
            if (enumFactory == null)
            {
                throw new InvalidOperationException("Missing the SCompEnumService service.");
            }

            IEnumComponents enumerator;
            Marshal.ThrowExceptionForHR(enumFactory.GetReferencePathsForTargetFramework(
                TargetFrameworkMoniker.FullName, out enumerator));
            if (enumerator == null)
            {
                throw new ApplicationException(
                    "IVsComponentEnumeratorFactory4.GetReferencePathsForTargetFramework returned null.");
            }

            var paths = new StringBuilder();
            var data = new VSCOMPONENTSELECTORDATA[1];
            uint fetchedCount;
            while (enumerator.Next(1, data, out fetchedCount) == VSConstants.S_OK && fetchedCount == 1)
            {
                Debug.Assert(data[0].type == VSCOMPONENTTYPE.VSCOMPONENTTYPE_Path);
                paths.Append(data[0].bstrFile);
                paths.Append(";");
            }

            // Trim off the last semicolon.
            if (paths.Length > 0)
            {
                paths.Length -= 1;
            }

            return paths.ToString();
        }