Quirk String.Remove vs StringBuilder.Remove

[TT(n)]

I found a quirk that may be helpful for someone else to know, if they run into the same mistake.
EDIT: By quirk, I mean that a newbie may not be able to predict the behavior, thus causing them to make a mistake.


You can remove part of a string "In place" by using the StringBuilder.Remove method.

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim sb As New System.Text.StringBuilder("randomstring2342")

        sb.Remove(0, 6)

        MessageBox.Show(sb.ToString)
    End Sub

However, you can not remove it "In place", if you are using String.Remove.

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim s As String = "randomstring2342"

        s.Remove(0, 6)

        MessageBox.Show(s)
    End Sub

You have to use the return value instead.

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim s As String = "randomstring2342"

        s = s.Remove(0, 6)

        MessageBox.Show(s)
    End Sub

Although, the stringbuilder allows you to use the return value too.
One might not expect that you'd be able to set it "In place" or by it's "Return value".
You may expect that a String can be set in place though.