Q:

Regex Replace with forward slash

Can someone please explain how to get this regex working?   I'm trying to take this string:
"Test0/1"

and turn it into:
"Test0\/1"

I'm using this, but it is not working:
var test = Regex. Replace("Test0/1", @"/", @"\/");

It keeps giving me 
"Test0\\/1"

Then I want to take the results of the string and put it into a Regex statement like so:
var match  = new Regex(test).Match(myString);

So the string 'test' has to be a valid regex statement. 
Basically what I'm trying to do is take a list of interfaces off a device, create a regex statement out of them and then use that regex to compare results for other things in my code.   Because of the way interfaces are formatted "FastEthernet0/1" for example, it is causing my regex to fail because you have to escape all forward slashes.   I have to build this regex on the fly though because every device will have a different set of interfaces. 

A:

This is a function of Visual Studio automatically escaping the \ on your behalf.  Look at the following question: What's the use/meaning of the @ character in variable names in C#?.  Removing the @ symbol from @"\" turns the string into "\\".