WorkflowRuntime events are missing when using an indexer! Bug or Feature?

Hello,

we are getting some strange behavior from the WorkflowRuntime when using an C# indexer within a SequentialWorklfowActivity, the events like WorkflowCompleted are not being fired anymore.

Here is the scenario/code:

namespace WorkflowConsoleApplication3 {

public sealed partial class Workflow1 : SequentialWorkflowActivity {

public Workflow1() {
InitializeComponent();
Console.WriteLine("MySequentialWorkflow ctor");
Variables = new Variable2[] { new Variable2("WorkplaceName", "", false, ""),
new Variable2("UserName", "", false, ""), };
}

[Description("Variables for this workflow")]
public Variable2[] Variables {
get { return variables; }
set { variables = value; }
}

private Variable2[] variables;

private void codeActivity1_ExecuteCode(object sender, EventArgs e) {
Console.WriteLine(this["FooVar"]);
}

// INDEXER
public string this[string Name] {
get {
Variable2 v = FindVar(Name);
if(v != null)
return v.Value;

return "";
}

set {
Variable2 v = FindVar(Name);
if(v != null)
v.Value = value;
}
}

public Variable2 FindVar(string Name) {
foreach(Variable2 v in Variables)
if(v._Name == Name) return v;
return null;
}

public string GetVar(string Name) {
Variable2 v = FindVar(Name);
if(v == null) return " " + Name + " unknown ";

return v.Value;
}

public bool SetVar(string Name, string Value)’{
Variable2 v = FindVar(Name);
if(v == null) return false;
v.Value = Value;
return true;
} }

[Serializable]
public class Variable2 {
public Variable2() { }
public Variable2(string aName, string aValue, bool bReqOnCreation, string aDescription) {
name = aName;
val = aValue;
description = aDescription;
reqOnCreation = bReqOnCreation;
}

// There a number of properties here to get the values
}

The main program (a console app) creates the WorkflowRuntime as usual and subscribes to the events, like so:

using(WorkflowRuntime workflowRuntime = new WorkflowRuntime()) {
AutoResetEvent waitHandle = new AutoResetEvent(false);
workflowRuntime.WorkflowCompleted += delegate(object sender, WorkflowCompletedEventArgs e) {
Console.WriteLine("WorkflowCompleted event received.");
waitHandle.Set();
};

workflowRuntime.WorkflowTerminated += delegate(object sender, WorkflowTerminatedEventArgs e){
Console.WriteLine(e.Exception.Message);
waitHandle.Set();
};

From the moment on where I use an indexer like illustrated above these two WorkflowRuntime events are not fired anymore! Is this a known limitation/feature/bug When using a "string GetVariable(string name)" and a "void SetVariable(string name, string value)" then the events are delivered as expected! But what makes the explicit method approach different from the indexer approach, if one considers that the C# compiler generates the same kind of methods!

It is very easy to reproduce this behavior, just copy and paste the Workflow1 code from above including the definition for Variable2 and add the fields/properties to the Variable2 class in order to access the values. Have a console workflow test program and use the above illustrated subscritpion code.

So please come back whith some information on that topic!

Regards,
Andy

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