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Hosted Designer fails to load workflow xaml that has InArguments with default values (xaml saved by

Posted By:      Posted Date: September 02, 2010    Points: 0   Category :Windows Application
 
I have hosted the designer in our app. Using the hosted designer, workflows are saved as xaml to a database. When an end user wishes to edit a workflow the xaml is downloaded to a file and loaded into the designer via the .xaml file. The user can also associate assemblies with the workflow and there is a mechanism which makes sure that these assemblies are loaded into the appdomain and available. The problem we are hitting occurs when the top level activity (Sequence) has InArgument with default value. I create a simple Sequence, add InArguments (type of Int32 and String)  and set some default values. I save the workflow xaml to the database and close down the designer. When I wish to edit the workflow and try to load I get the following errors Could not find member '{clr-namespace:}_e905.argument3'. Could not find member '{clr-namespace:}_e905.argument1'. suggesting that some assembly/namespace missing. Here is the xaml I try to load: <Activity mc:Ignorable="sap" x:Class="{x:Null}" this:_e905.argument3="99" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:s="clr-namespace:System;assembly=mscorl


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