For the project level go to Project -> Properties -> Build tab

If you want to disable the warning to some code section, try this :
#pragma warning disable XXX,XXX
//your code
#pragma warning restore XXX,XXX
Read about #pragma warning
For the project level go to Project -> Properties -> Build tab

If you want to disable the warning to some code section, try this :
#pragma warning disable XXX,XXX
//your code
#pragma warning restore XXX,XXX
Read about #pragma warning