c# - how to implement Action<..> as Func<...>

Question

I'd like to implement Action as func and get the error : could not use void in this context. Please advise

Action<string> someFunc_1 = Console.WriteLine;
someFunc_1("Test");

Func<string, void> someFunc_2 = Console.WriteLine;

Answer 1

Action<T1, T2, ...>完成替换Func<T1, T2, ..., void>。

你不能void在泛型中使用。它不是 C# 中的类型。

然后在你的情况下，使用Action<string>而不是Func<string, void>.

Answer 2

Func<string, bool> someFunc_2 = s =>
{
  Console.WriteLine(s);
  return true;
};