The third type of comments is XML documentation comment.
In the C# source code, the comments may contain XML tags.
Those tags mark the comments to provide information for the code.
using System;
class Program
{
///
/// This the XML documentation.
///
static void Main(string[] args)
{
int i = 0;
int j = 2;
Console.WriteLine("i=" + i);
Console.WriteLine("j=" + j);
}
}