using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace MyCustomComponents.Extensions { public class HierarchyNullException : Exception { public HierarchyNullException() { } public HierarchyNullException(string message) : base(message) { } public HierarchyNullException(string message, Exception inner) : base(message, inner) { } } }