What matches this regex?

This compiles and executes:

 var re = new Regex(@"what\ever");

But I can't find anything that matches it. whatever, what\ever and what\\ever all fail to match.

\e isn't a valid escape sequence AFAIK, so I'm not sure what the intended behaviou开发者_StackOverflow中文版r here is...

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I think \e matches the "Escape" character (ASCII code 27). Hence it should match "what\x1bver"

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\e is the escape control character

you can use a free tool called The Regulator which has built in intellisense which helps for things like this.

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\e is usually equal to \033.

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It's the escape sequence (0x1B).

See non printable characters section here.

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I think you should use

var re = new Regex(@"[what\ever]");

to match "what\ever"