ComboBox or Textbox AutoComplete on SubString

public static IEnumerable GetMatches(string[] items, string pattern)
{
    if(items == null || items.Length == 0) yield break;
    foreach(var match in items)
    {
        if (match.Contains(pattern)) yield return match;
    }
}

Hi Yuva,

You can go through this article included source code.

https://www.codeproject.com/Tips/631196/ComboBox-with-Suggest-Ability-based-on-Substring-S