RegularExpressionAttribute.cs

using System;
 
namespace Waher.Things.Attributes
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
    public class RegularExpressionAttribute : Attribute
    {
        private readonly string pattern;
 
        public RegularExpressionAttribute(string Pattern)
        {
            this.pattern = Pattern;
        }
 
        public string Pattern => this.pattern;
    }
}