Dear sir
Thank you for giving me this opportunity to bid on your project. I read your job requirement and wish I can work on your project.
I've a rich experience in the developments with c, c++ and c#, and I'm able to build your app to satisfy you. You can be sure and believe me if you test my skills directly.
I never disappoint clients and their benefits come first. I provide qualified and trustworthy long-term service. Hope you contact me to discuss more in detail on your project.
Regards