ASCII to Hex

I'm currently using the following code, but it won't convert "advanced ASCII", such as: ™ ¥ © etc...
It just gives them a question mark value (3F).

How can I make it convert them correctly?

Code:

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        Dim str As String = TextBox1.Text
        Dim bytes() As Byte
        Dim hexn As System.Text.StringBuilder = New System.Text.StringBuilder
        bytes = System.Text.ASCIIEncoding.ASCII.GetBytes(str)
        For i As Integer = 0 To bytes.Length - 1
            hexn.Append(bytes(i).ToString("x"))
        Next
        TextBox2.AppendText((hexn.ToString()))

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Quote:

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Originally Posted by MS-47

I'm currently using the following code, but it won't convert "advanced ASCII", such as: ™ ¥ © etc...
It just gives them a question mark value (3F).

How can I make it convert them correctly?

Code:

---

        Dim str As String = TextBox1.Text
        Dim bytes() As Byte
        Dim hexn As System.Text.StringBuilder = New System.Text.StringBuilder
        bytes = System.Text.ASCIIEncoding.ASCII.GetBytes(str)
        For i As Integer = 0 To bytes.Length - 1
            hexn.Append(bytes(i).ToString("x"))
        Next
        TextBox2.AppendText((hexn.ToString()))

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...because they're not ASCII; change encoding to UTF-8 instead or Unicode.