Compiler Warning (level 1) CS3002

Return type of 'method' is not CLS-compliant

A public, protected, or protectedinternal method must return a value whose type is compliant with the Common Language Specification (CLS). For more information on CLS Compliance, see Writing CLS-Compliant Code and Common Language Specification.

Example

The following example generates CS3002:

// CS3002.cs

[assembly:System.CLSCompliant(true)]
public class a
{
    public ushort bad()   // CS3002, public method
    {
        ushort a;
        a = ushort.MaxValue;
        return a;
    }

    private ushort OK()   // OK, private method
    {
        ushort a;
        a = ushort.MaxValue;
        return a;
    }

    public static void Main()
    {
    }
}