@ Prefix

This puts everything within the string declaration "as is"
Using a verbatim literal enables you to add newline characters and other special characters to your strings.
To include a speech mark in an verbatim string literal you need to include it twice.

string myString; 
myString = @"C:\temp" 
System.Diagnostics.Trace.Write(myString);      '= "C:\temp"  

myString = @"My ""Temp\"" folder" 
System.Diagnostics.Trace.Write(myString);      '= "My "Temp" folder"