运算符，该运算符执行委托串联。

Operator, which performs delegate concatenation.

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委托类型也提供二元+运算符，该运算符执行委托串联。

Delegate types also provide a binary + operator, which performs delegate concatenation.

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委托类型也提供二元+运算符，该运算符执行委托串联。

Delegate types also provide a binary + operator, which performs delegate concatenation.

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