Compiler Warning (level 1) CS3024

Constraint type 'type' is not CLS-compliant.

The compiler issues this warning because the use of a non-CLS-compliant type as a generic type constraint could make it impossible for code written in some languages to consume your generic class.

To eliminate this warning

1. Use a CLS-compliant type for the type constraint.

Example

The following example generates CS3024 in several locations:

// cs3024.cs  
// Compile with: /target:library  
 [assembly: System.CLSCompliant(true)]  
  
[type: System.CLSCompliant(false)]  
public class TestClass // CS3024  
{  
    public ushort us;  
}  
[type: System.CLSCompliant(false)]  
public interface ITest // CS3024  
{}  
public interface I<T> where T : TestClass  
{}  
public class TestClass_2<T> where T : ITest  
{}  
public class TestClass_3<T> : I<T> where T : TestClass  
{}  
public class TestClass_4<T> : TestClass_2<T> where T : ITest  
{}  
public class Test  
{  
    public static int Main()  
    {  
        return 0;  
    }  
}  

See also

• Constraints on Type Parameters