The comments that spread more than one line is called multi-line comments −
/* The following is a multi-line Comment In C# /*
The /*...*/ is ignored by the compiler and it is put to add comments in the program.
The following is a sample C# program showing how to add MULTI-line comments −
using System; namespace Demo { class Program { static void Main(string[] args) { /* The following is a multi-line Comment In C# /* // printing Console.WriteLine("Hello World"); Console.ReadKey(); } } }