We have a requirement to find the current user control’s project name at design time.  We used the EnvDTE to find the project name as

DTE dte = this.GetService(typeof(EnvDTE.DTE)) as EnvDTE.DTE;

            if (dte == null)

                return null;

            if (dte.ActiveDocument != null &&

                dte.ActiveDocument.ActiveWindow != null &&

                dte.ActiveDocument.ActiveWindow.Project != null)

            {

                Project currentProject = dte.ActiveDocument.ActiveWindow.Project;

                return currentProject.Properties.Item(“AssemblyName”).Value;

                         }