How to remove duplicates from TextBox?

Question

I have a text box in which there is every element of a new line. I am trying to remove duplicates from this text box. I can’t think of anything. I tried to add each element to the array and remove duplicates, but it does not work. Are there any other options?

Answer 1

yourTextBox.Text = string.Join(Environment.NewLine, yourArray.Distinct());

Answer 2

Based on what Anthony Pegham wrote, but without a separate array:

yourTextBox.Text = string.Join(Environment.NewLine, yourTextBox.Lines.Distinct());

Answer 3

public static string[] RemoveDuplicates(string[] s)
{
    HashSet<string> set = new HashSet<string>(s);
    string[] result = new string[set.Count];
    set.CopyTo(result);
    return result;
}

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