Write a Program input : string s= 'abc';;out put: [a,b,c,ab,ba,ac,bc,ca,abc]

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { string s = "abc"; Console.WriteLine("Enter The Three Character:"); // string ch = Console.ReadLine(); char[] chabc = s.ToCharArray(); for (int i = 0; i < s.Length; i++) { try { string dh = s.Substring(i, 1); Console.Write(dh); Console.Write(","); } catch (Exception) { // throw; } } for (int i = 0; i < s.Length; i++) { for (int j = 0; j < chabc.Length; j++) { if (i != j) { try { Console.Write(s.Substring(i, 1)); Console.Write(s.Substring(j, 1)); Console.Write(","); } catch (Exception) { // throw; } } } } Console.Write(s.Substring(0, 3)); Console.ReadKey(); } } }

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; namespace abc { class Program { static void Main(string[] args) { string s = ""; Console.WriteLine("Enter The Three Character:"); string ch = Console.ReadLine(); char[] chabc = ch.ToCharArray(); ArrayList arr = new ArrayList(); for (int i = 0; i < 3; i++) { for (int j = 0; j < chabc.Length; j++) { if (i == 0) { //Console.Write(chabc[j] + ","); arr.Add(chabc[j]); } if (i == 1 && i!=j) { //Console.Write(chabc[j]+""+chabc[i]+","+chabc[i]+""+chabc[j]+","); string a1 = chabc[j] + "" + chabc[i]; arr.Add(a1); string a2 = chabc[i] + "" + chabc[j]; arr.Add(a2); } if (i == 2 && i!=j) { if (j == 0) { string a1 = chabc[j] + "" + chabc[i]; arr.Add(a1); string a2 = chabc[i] + "" + chabc[j]; arr.Add(a2); } } } s = s + chabc[i]; } arr.Add(s); int n=arr.Count; for (int i = 0; i < n; i++) { Console.Write(arr[i] + ","); } Console.ReadKey(); } } }