Hello Krishna,
You can download the VectorLayer sample from the following url :
http://our.componentone.com/samples/silverlight-c1mapsvectorlayer/
If you have installed the latest Studio for Silverlight setup, then the sample will be installed on the following path:
C:\Users\[UserName]\Documents\ComponentOne Samples\Studio for Silverlight\C1.Silverlight.Maps\CS\VectorLayer
Thanks,
Richa