Use of Button to Stop the Running Process

Question

Hello All,

 

I have a  Build Button in the windows form application and inside this i have the code to build the specific projects inside the folder.  The folder name is  given as checkbox and when i check the checkbox and click the build button the projects declared inside a array of string will build one by one.

 

Now my problem is when i click the Stop button the  process will not stop ?? How can i stop my process with the help of Stop Button in my application ??