Convert RichTextBox Editor value to Bytes using C# and VB.Net

Please refer below code

HTML

<div>
    <asp:TextBox ID="txtRich" runat="server" TextMode="MultiLine" />
    <br />
    <asp:Button Text="Save" runat="server" OnClick="Save" />
    <br />
    <asp:Label ID="lblResult" runat="server" />
</div>

C#

protected void Save(object sender, EventArgs e)
{
    System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
    Byte[] bytes = encoding.GetBytes(txtRich.Text);
    // write  code to save data
    lblResult.Text = "Entered Text : " + encoding.GetString(bytes);
}

VB

Protected Sub Save(sender As Object, e As EventArgs)
	Dim encoding As New System.Text.ASCIIEncoding()
	Dim bytes As [Byte]() = encoding.GetBytes(txtRich.Text)
	' write  code to save data
	lblResult.Text = "Entered Text : " + encoding.GetString(bytes)
End Sub

Screenshot