Compiler Warning (level 1) CS1635

Cannot restore warning 'warning code' because it was disabled globally

This warning occurs if you use the /nowarn command line option or project setting to disable a warning for the entire compilation unit, but you use #pragma warning restore to attempt to restore that warning. To resolve this error, remove the /nowarn command line option or project setting, or remove the #pragma warning restore for any warnings you are disabling via the command line or project settings. For more information, see #pragma warning.

The following sample generates CS1635:

C#

// CS1635.cs  
// compile with: /w:1 /nowarn:162  
  
enum MyEnum {one=1,two=2,three=3};  
  
class MyClass  
{  
    public static void Main()  
    {  
#pragma warning disable 162  
  
    if (MyEnum.three == MyEnum.two)  
        System.Console.WriteLine("Duplicate");  
  
#pragma warning restore 162  
    }  
}