using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var defaultError = new DefaultError();

        defaultError.ErrorType = ValidationErrorType.SkuCodeDuplicateByUser;

        //DefaultError defaultError = null;

        switch (defaultError?.ErrorType) {

            case ValidationErrorType.SkuCodeDuplicateByUser:

            case ValidationErrorType.SkuCodeDuplicateBySupplier:

                Console.WriteLine("Hit Exception");

                throw new Exception($"Please update the Name");

            default:

                Console.WriteLine("Hit default");

                break;

        }

        Console.WriteLine("SUCCESS");

    }

}

​

​

public class DefaultError

{

    public ValidationErrorType ErrorType { get; set; }

}

public enum ValidationErrorType

    {

        None = 0,

        SkuCodeDuplicateByUser,

        SkuCodeLength,

        SkuCodeMissing,

        SkuCodeDuplicateBySupplier,

        Unkown = 99

    }