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Compiler Warning (level 1) CS3003 

Error Message

Type of 'variable' is not CLS-compliant

A public, protected, or protected internal variable must be of a type that is compliant with the Common Language Specification (CLS). For more information on CLS Compliance, see Writing CLS-Compliant Code and Common Language Specification.


The following example generates CS3003:

// CS3003.cs

public class a
    public ushort a1;   // CS3003, public variable
    public static void Main()