How do you replace a single character with a backslash using regex.replace in c#

Question

If I do this:

Regex.Replace("unlocktheinbox.com", "[t]", "\\$&");

My result is:

"unlock\\theinbox.com"

I'm expecting it to be

"unlock\theinbox.com"

I'm trying to replace "t" with "\t" using regex.replace. I made this example very basic to explain what I'm trying to accomplish.

Try this Regex.Replace("unlocktheinbox.com", "[t]", @"\"); — tchelidze
– tchelidze, Commented Jan 30, 2016 at 19:24
Nope, the example you provided works as expected. If you're basing your observations on the watch/locals window in Visual Studio, it just shows "unlock\\theinbox.com", \\ means it's one backslash, but in string it has to be escaped. If you Console.WriteLine out the resulting string, it shows up correctly. — Szabolcs Dézsi
– Szabolcs Dézsi, Commented Jan 30, 2016 at 19:26
Your output is correct, but the debugger shows the result as a valid C# string. Try to write it to the console for instance and you'll see. — Lucas Trzesniewski
– Lucas Trzesniewski, Commented Jan 30, 2016 at 19:26
I was testing in the Immediate window - but now I can see in the console window it is correct. — Henry
– Henry, Commented Jan 30, 2016 at 19:31

tchelidze · Accepted Answer · 2016-01-30 19:32:44Z

3

Try following

var result = Regex.Replace("unlocktheinbox.com", "[t]", @"\");

Note that, if you observe result while debugging via hovering mouse on result. it will look like unlock\\theinbox.com because \ is escaped. But actually, if you print result or use anywhere it will be unlock\theinbox.com

edited Jan 30, 2016 at 19:32

answered Jan 30, 2016 at 19:27

tchelidze

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