An idea for a signal in C#

Signal.cs

public class Signal<T>
  {
		public delegate void SignalDelegate<T>(T data);
	
		event SignalDelegate<T> signal;
		List<SignalDelegate<T>> onceDelegates = new List<SignalDelegate<T>>();
	
		public void Bind<T>(SignalDelegate<T> signalDelegate)
		{
			signal += signalDelegate;
		}
		
		public void BindOnce<T>(SignalDelegate<T> signalDelegate)
		{
			signal += signalDelegate;
			onceDelegates.Add(signalDelegate);
		}
		
		public void UnBind<T>(SignalDelegate<T> signalDelegate)
		{
			signal -= signalDelegate;
		}
		
		public void Dispatch(T data)
		{
			injector.binder.Bind<T>().ToValue(data);
			signal(data);
			injector.binder.Unbind<T>();
			
			foreach (SignalDelegate<T> signalDelegate in onceDelegates)
				signal -= signalDelegate;
		}
	}