?? に詳しい人って意外と少ないみたい
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厳選したリンク集 ??
?? and ??= operators - the null-coalescing operators
The null-coalescing operator ?? returns the value of its left-hand operand if it's not null. Otherwise, it evaluates the right-hand operand and returns its result ...
c# 操作符?? null coalescing operator
?? "null coalescing" operator 是c#新提供的一个操作符， ?个操作符提供的功能是判断左?的操作数是否是null, 如果是?返回?果是右?的操作数;非null?返回左?的操作数。 C#中的两个?号 “？？“ 的含?及使用 通?上述示例，我?可以看到空合并运算符在?理 ...
null-coalescing-operator.md
The null-coalescing operator ?? returns the value of its left-hand operand if it's not null. Otherwise, it evaluates the right-hand operand and returns its result.
is null-coalescing operator an atomic operation ? #8526
It just says: The rules of the ?. operator ensure that the left-hand side of the operator is evaluated only once. That text is kind of funny. It's as if there are operators that evaluate their ...
