C＃相当于VB.NET的捕捉...当 [英] C# equivalent to VB.NET's Catch...When

问题描述

在VB.NET我经常赶上......当：

In VB.NET I often Catch…When:

Try
    …
Catch e As ArgumentNullException When e.ParamName.ToUpper() = "SAMPLES"
    …
End Try

有C＃相当于捕捉...当？

我不希望诉诸使用抓内部的如果语句如果可能的话。

I don't want to resort to using an if statement inside a catch if possible.

推荐答案

此功能是为宣布C＃6.现在可以写

This functionality was announced for C# 6. It is now possible to write

try { … }
catch (MyException e) when (myfilter(e))
{
    …
}

您可以下载的的Visual Studio 2015年来检查了这一点，还是等待正式发布。

You can download the preview of Visual Studio 2015 now to check this out, or wait for the official release.

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