Concatenate
Removes the top two items from the stack, concatenates them, and then pushes the result onto the stack.
<ic:Operation Name="Concatenate" />
Top two items on the stack.
String result of the concatenation operation.
In the following example update expression, the constant string "Start:" is concatenated with the value of the "EventTime" context property and persisted to the database column NewOrderCreateTime.
<ic:Update DataItemName="NewOrderCreateTime" Type="NVARCHAR">
<ic:Expression>
<ic:Operation Name="Constant">
<ic:Argument>Start:</ic:Argument>
</ic:Operation>
<wf:Operation Name="GetContextProperty">
<wf:Argument>EventTime</wf:Argument>
</wf:Operation>
<ic:Operation Name="Concatenate" />
</ic:Expression>
</ic:Update>