How to create WSP from solution file visual studio

Often we need to create wsp(work solution package) from Solution file.

What we do

Step1: In Release mode Clean solution.
Step2:Check in bin folder of solution
bin>Release

Delete craeted wsp file from there.

Step3: Now Go to Build->Package

Now go to bin>Release

Your wsp file is created.you can check CAS policy there in solution file.

Go to package then.

Under Package.Template.xml

You can check CAS policy.