在C＃中联合运营？ [英] Coalesce operator in C#?

问题描述

我想我记得看到一些类似：三元运算符在C＃中，只有有两个部分，并会返回变量的值，如果它不是空和默认值，如果它是。事情是这样的：

I think i remember seeing something similar to the ?: ternary operator in C# that only had two parts to it and would return the variable value if it wasn't null and a default value if it was. Something like this:

tb_MyTextBox.Text = o.Member ??SOME OPERATOR HERE?? "default";

这基本上相当于：

Basically the equivalent of this:

tb_MyTextBox.Text = o.Member != null ? o.Member : "default";

有没有这样的事情存在，还是我只是想象看到了这个地方？

Does such a thing exist or did I just imagine seeing this somewhere?

推荐答案

烨：

tb_myTextBox.Text = o.Member ?? "default";

<一个href="http://msdn.microsoft.com/en-us/library/ms173224(VS.80).aspx">http://msdn.microsoft.com/en-us/library/ms173224(VS.80).aspx

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