Use Hashset to remove duplicate characters.
Here is the string −
string myStr = "kkllmmnnoo";
Now, use HashSet to map the string to char. This will remove the duplicate characters from a string.
var unique = new HashSet<char>(myStr);
Let us see the complete example −
using System; using System.Linq; using System.Collections.Generic; namespace Demo { class Program { static void Main(string[] args) { string myStr = "kkllmmnnoo"; Console.WriteLine("Initial String: "+myStr); var unique = new HashSet<char>(myStr); Console.Write("New String after removing duplicates: "); foreach (char c in unique) Console.Write(c); } } }
Initial String: kkllmmnnoo New String after removing duplicates: klmno