[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
    public class DecimalPrecisionAttribute : Attribute
    {
        public byte Precision { get; private set; }

        public byte Scale { get; private set; }

        public DecimalPrecisionAttribute(byte precision, byte scale)
        {
            Precision = precision;
            Scale = scale;
        }
    }

    public class DecimalPrecisionConvention : PrimitivePropertyAttributeConfigurationConvention<DecimalPrecisionAttribute>
    {
        public override void Apply(ConventionPrimitivePropertyConfiguration configuration, DecimalPrecisionAttribute attribute)
        {
            configuration.HasPrecision(attribute.Precision, attribute.Scale);
        }
    }