Attached is a macro in VB for this task. It reads the STAAD model and creates a file named
Member Release Data.txt
in the folder
E:\yyy
The data written in that file will consist of the degrees of freedom released or assigned a spring, on a member by member basis.
You could try translating it to C#. If you are unable to do that, please post the one that you have created, and we'll ask someone who knows C# to take a look. But it may take some time.(Please visit the site to view this file)