Ho to remove the duplicate char from the string using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApp1 { public class Program { static void Main(string[] args) { string input = "Hello world descanding"; char [] inputvalue = {'a','e','i'}; string temp = string.Empty; int count = 0; string valuefinal = string.Empty; for (int i =0;i<input.Length-1;i++) { for (int j=0;j< inputvalue.Length-1;j++) { ...