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wantedfast/C# Delegate

Created November 17, 2019 03:12
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Learning notebook of C# Delegate
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C# Delegate
## Advantage
Decoupling the method
Code a plugin method
### Code A Plugin Method
public delegate int Transformer(int x);
public static int GetNumber(int[] values, Transformer t){};
static void Main()
{
int[] vaules = {1,2,3};
GetNumber(values,square);
}
private static int square(int x) => x*x;
## Multiple Delegate
SomeDelegate d = someMethod();
d += someMethod1();
d -= someMethod1(); // Remove the delegate.
如果多播委托的返回类型不是VOID, 那么调用者就会从最后一个调用者的方法中取得返回值，之前的返回值都会被弃用。
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