Enum declaration

 public partial class Voucher
    {

        public VoucherTypes VoucherType
        {
            get { return (VoucherTypes)this.VoucherTypeId; }//id value in database field
            set { this.VoucherTypeId = (int)value; }
        }
    }
  
    public enum VoucherTypes
    {
        Journal = 0,
        Payment = 1,
        Receive = 2,
        Contra = 3,       
    }