Making a verbatim string

In the preceding line, you need to specify the key-value pairs within the parentheses. The key is notepad.exe. If you try to put a path such as c:\data\samplefile.txt directly into your code, it doesn't work. You see how it gets underlined red? The popup says Represents text as a series of Unicode characters. These things don't work. So, to fix this, you put the @ (at) symbol in front of it. Now, you have a verbatim string.

In this context here, Notepad is the key and the value is the samplefile.txt file.

Next, enter the following line directly beneath the preceding one:

filePrograms.Add("iexplore.exe", "http://www.bing.com");

So, Internet Explorer will open the http://www.bing.com page. You see?