Two strings are given, remove all occurrences or the characters in the second string from the first string
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; namespace RemoveRepeatedCharacters { class Program { static void Main(string[] args) { Console.WriteLine("Enter the orirginal string"); string str = Console.ReadLine(); Console.WriteLine("Enter the characters to be removed string"); string rem = Console.ReadLine(); Hashtable remhash = new Hashtable(); foreach (char ch in rem) { if (!remhash.ContainsValue(ch)) { remhash.Add((int)ch, ch); } } string final = ""; foreach (char ch in str) { if (!remhash.ContainsValue(ch)) { final = final + ch; } } Console.WriteLine(final); Console.ReadLine(); } } }