An identifier with an @ prefix is called a verbatim identifier.
The prefix "@" enables the use of keywords as identifiers, which is useful when interfacing with other programming languages.
Example 1:
public ArrayList @params {
get { return this.paramsField; }
set { this.paramsField = value; }
}
params is a C# keyword and cannot be used as a identifier unless you prefix it with the "@" symbol.
Example 2:
The problem in C# - Strings allow escape sequences.
string a = "Here's a tab:\t";
This means you must type double back slash "\\t" if you want the back slash to be shown in the string and not used as a horizontal-tab escape sequence.
Simply type
string a = @"Here's a tab:\t";
The string will not interpret the "\" character as an escape sequence.
