1.cs `��[�U /* modified from original source: https://bitbucket.org/mattkotsenas/c-promises/overview */ using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Promises { public interface Promise { Promise Done(Action callback); Promise Fail(Action callback); Promise Always(Action callback); bool IsRejected { get; } bool IsResolved { get; } bool IsFulfilled