How do I remove duplicates from a C# array?
You could possibly use a LINQ query to do this:
int[] s = { 1, 2, 3, 3, 4};int[] q = s.Distinct().ToArray();
Here is the HashSet<string> approach:
public static string[] RemoveDuplicates(string[] s){ HashSet<string> set = new HashSet<string>(s); string[] result = new string[set.Count]; set.CopyTo(result); return result;}Unfortunately this solution also requires .NET framework 3.5 or later as HashSet was not added until that version. You could also use array.Distinct(), which is a feature of LINQ.
The following tested and working code will remove duplicates from an array. You must include the System.Collections namespace.
string[] sArray = {"a", "b", "b", "c", "c", "d", "e", "f", "f"};var sList = new ArrayList();for (int i = 0; i < sArray.Length; i++) { if (sList.Contains(sArray[i]) == false) { sList.Add(sArray[i]); }}var sNew = sList.ToArray();for (int i = 0; i < sNew.Length; i++) { Console.Write(sNew[i]);}You could wrap this up into a function if you wanted to.