Conversion to a double-escaped string

Question

In C#, I have a filename that needs to converted to be double-escaped (because I feed this string into a regex).

In other words, if I have:

FileInfo file = new FileInfo(@"c:\windows\foo.txt");
string fileName = file.FullName;

fileName is: c:\\\\windows\\\\foo.txt

But I need to convert this to have sequences of two literal backslashes \\ in the fileName. fileName needs to be @"c:\\\\windows\\\\foo.txt", or "c:\\\\\\\\windows\\\\\\\\foo.txt". Is there an easy way to make this conversion?

Answer 1

simplest without resorting to regex for this part:

string fileName = file.FullName.Replace(@"\", @"\\\\");

based on OP, but I think you really want this:

string fileName = file.FullName.Replace(@"\", @"\\");

That being said, I can't see how you want to use it... it shouldn't need escaping at all... maybe you should post more code?

Answer 2

I Think you're looking for Regex.Escape

Regex.Escape(@"c:\test.txt") == @"C:\\Test\.txt"

notice how it also escapes '.'