Create Custom Condition in Sitecore WFFM

Sample code snippet to create custom condition in Sitecore WFFM

public class CustomCondition<T> : StringOperatorCondition<T> where T : RuleContext
    {
        public string FieldName
        {
            get;
            set;
        }
        public string Value
        {
            get;
            set;
        }
        protected override bool Execute(T ruleContext)
        {
            if (Condition > 0)
            {
                return true;
            }
            return false;
        }
    }