Create your GUID with Visual Studio Express 2013 .

The file called AssemblyInfo.cs contains information about your programme and provides properties for getting the information about the application, such as the version number, description, loaded assemblies.
This is just a simple example and you can read the docs from msdn docs

When you create the project you will find this file on Solution ExplorerProperties .
Into this file you need to add your GUID.
A Globally Unique Identifier is a unique reference number used as an identifier named GUID.
The GUID refers to various implementations of the universally unique identifier and usually stored as 128-bit values.
You can use the tools in Visual Studio Express 2013 on the Tools menu, click Create GUID. The Create GUID tool appears with a GUID in the Result box.