Unrecognized escape sequence for path string containing backslashes

The following code generates a compiler error about an "unrecognized escape sequence" for each backslash:

string foo = "D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";

I guess I need to escape backslash? How do I do that?

You can either use a double backslash each time

string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";

or use the @ symbol

string foo = @"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";

Try this:

string foo = @"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";

The problem is that in a string, a \ is an escape character. By using the @ sign you tell the compiler to ignore the escape characters.

You can also get by with escaping the \:

string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";

var foo = @"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";

If your string is a file path, as in your example, you can also use Unix style file paths:

string foo = "D:/Projects/Some/Kind/Of/Pathproblem/wuhoo.xml";

But the other answers have the more general solutions to string escaping in C#.

string foo = "D:\\Projects\\Some\\Kind\\Of\\Pathproblem\\wuhoo.xml";

This will work, or the previous examples will, too. @"..." means treat everything between the quote marks literally, so you can do

@"Hello
world"

To include a literal newline. I'm more old school and prefer to escape "\" with "\\"

来源：https://stackoverflow.com/questions/1302864/unrecognized-escape-sequence-for-path-string-containing-backslashes

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