You can suppress this warning :
1- By pargma
put this line at top of you class file:
#pragma warning disable 0169
2- By settings of your project
In Solution Explorer, choose the project in which you want to suppress warnings.
On the menu bar, choose View, Property Pages.
Choose the Build page.
In the Suppress warnings box, specify the error codes of the warnings that you want to suppress, separated by semicolons, and then rebuild the solution.
(your needed warning code is 0169)