I am not sure what the heck I am doing wrong. I would like if when the user selects no, then the app setting is nothing. By nothing I mean nothing, I am using "Nothing" to test but its not working it returns whatever is in the richtextbox

This is in my formclosing event

Code:
Dim msg As String = "Do you want to save your comments?"
        MessageBox.Show(msg, "Save", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
        If DialogResult = Windows.Forms.DialogResult.Yes Then
            My.Settings.Comments = Me.RichTextBox1.Text
            My.Settings.Save()
        ElseIf DialogResult = Windows.Forms.DialogResult.No Then
            My.Settings.Comments = "Nothing"
            My.Settings.Save()

        End If