Remove duplicate characters in a string in C# using Linq

  protected void Page_Load(object sender, EventArgs e)
    {
        VanishDuplicates("RemoveDuplicates");
    }

public string VanishDuplicates(string strInput)
    {
        string strOutPut = new string(strInput.ToCharArray().Distinct().ToArray());
        return strOutPut;
    }