private IWfProcessDescriptor InitializeMainStream(IWfProcessDescriptor processDesp)
{
WfProcessDescriptor clonedProcessDesp = (WfProcessDescriptor)processDesp.Clone();
clonedProcessDesp.SetProcessInstance(this);
clonedProcessDesp.Variables.SetValue("MainStream", "True", DataType.Boolean);
return clonedProcessDesp;
}