The best replacement for delegates is trustees.

The best alternatives to delegates are rated as following:
★★★★★  trustees
★★★★  events
★★★  interfaces
★★★  popular vote
★★  electors
★★  blocks
★★  super delegates
★★  representatives
★★  events c#
★  votes
★  function pointers
★  lambda expressions
★  events c
★  anonymous methods
★  pointers
  delegation
  delegates
  methods
  notifications
  superdelegates
  electoral votes
  caucus
  popular votes

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Speaking about delegates, one probably shouldn't forget about events.

Other search terms related to delegates and their ratings are:
★★★★★ events
★★★★ anonymous methods
★★★ lambda expressions
★ user controls
★ multithreading
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