Rock.Model.GroupService.GetByGuid C# (CSharp) Method

        public Group GetByGuid( Guid guid )
        {
            return Queryable().FirstOrDefault( t => t.Guid == guid );
        }

        /// <summary>
        /// Handles the Load event of the Page control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
        protected void Page_Load( object sender, EventArgs e )
        {
            Exception ex = GetSavedValue( "RockLastException" ) as Exception;
            if ( ex != null )
            {
                int? errorLevel = ( GetSavedValue( "RockExceptionOrder" ) ?? "" ).ToString().AsIntegerOrNull();

                ClearSavedValue( "RockExceptionOrder" );
                ClearSavedValue( "RockLastException" );

                bool showDetails = errorLevel.HasValue && errorLevel.Value == 66;
                if ( !showDetails )
                {
                    try
                    {
                        // check to see if the user is an admin, if so allow them to view the error details
                        var userLogin = Rock.Model.UserLoginService.GetCurrentUser();
                        GroupService service = new GroupService( new RockContext() );
                        Group adminGroup = service.GetByGuid( new Guid( Rock.SystemGuid.Group.GROUP_ADMINISTRATORS ) );
                        showDetails = userLogin != null && adminGroup.Members.Where( m => m.PersonId == userLogin.PersonId ).Count() > 0;
                    }
                    catch { }
                }

                if ( showDetails )
                {
                    lErrorInfo.Text = "<h3>Exception Log:</h3>";
                    ProcessException( ex, " " );
                }
            }
        }