String Variables in Orchestration: Use Quotation Marks when Assigning Initial Value

When working with Orchestrations in BizTalk, if you create a variable that’s a string type and assign its initial value, you’ll want to make sure that you put quotation marks around the value.  I failed to do so recently I had errors similar to these pop up when attempting to build the project:

identifier 'YOUR_VARIABLE_VALUE' does not exist in 'YOUR_ORCHESTRATION';  are you missing an assembly reference?