internal class RangeValidation : IValidation
{
    RangeAttribute range;
    public RangeValidation(RangeAttribute range)
    {
        this.range = range;
    }

    public bool Validate(object instance, PropertyInfo propertyInfo)
    {
        if(propertyInfo.PropertyType == typeof(int))
        {
            var value = (int)propertyInfo.GetValue(instance);
            return value >= range.Min && value <= range.Max;
        }
        else
        {
            throw new InvalidOperationException();
        }
    }
}