Program to print Fibonacci Numbers below 100 in c#

using System; class myclass {     static void Main()     {         int fn = 0;         int sn = 1;         int tn = 1;         Console.WriteLine(fn);         Console.WriteLine(sn);         while (true)         {             tn = fn + sn;             if (tn >= 100)             {                 break;             }             Console.WriteLine(tn);             fn = sn;             sn = tn;         }         Console.Read();     } }

Reverse a number using C#

using System; namespace Learn {     class Program     {         static void Main(string[] args)         {             Console.WriteLine("Enter a Number");             int numb = int.Parse(Console.ReadLine());             int reverse = 0;             while (numb > 0)             {                 int rem = numb % 10;                 reverse = (reverse * 10) + rem;                 numb = numb / 10;                            }             Console.WriteLine("Reverse number={0}", reverse);             Console.ReadLine();         }     } }

Reverse a string in C#.NET

using System; namespace Learn {     class Program     {         static void Main(string[] args)         {             string Str, Revstr = "";             int Length;             Console.Write("Enter A String : ");             Str = Console.ReadLine();             Length = Str.Length - 1;                         while (Length >= 0)             {                 Revstr = Revstr + Str[Length];                 Length--;             }             Console.WriteLine("Reverse  String  Is  {0}", Revstr);             Console.ReadLine();         }     } }