Because the backslash (\) is the first character in an escape sequence, you need to use the double-backslash sequence (\\) to embed actual backslashes in a string literal.
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| string file = "C:\\MyDir\\Another Dir\\thefile.txt"; |
Because this can get a little hard to read, C# allows using the at sign (@) character to indicate a verbatim string literal–a string literal in which escape sequences should not be interpreted.
Using a verbatim string literal, we can write the earlier string without doubling the backslashes:
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| string file = @"C:\MyDir\Another Dir\thefile.txt"; |
We can also use a verbatim string literal to split a string across multiple lines in the source code, rather than embedding the \n escape sequence:
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| string file = @"First lineSecond lineThird line"; |