How to accept TexBox Multiline text as it is typed in TextBox using C# in ASP.Net

Hi micah,

Refer below sample

HTML

<div>
    <asp:TextBox ID="TextBixcomment" runat="server" class="form-control" placeholder="DROP COMMENT?"
        Style="" Rows="5" TextMode="MultiLine" Font-Bold="False" Font-Names="Comic Sans MS"
        Wrap="True" Width="100%"></asp:TextBox>
    <br />
    <asp:Button ID="Button1" runat="server" Text="Update" OnClick="Display" />
    <br />
    <asp:Label ID="lblcomments" runat="server" />
</div>

C#

protected void Display(object sender, EventArgs e)
{
    lblcomments.Text = TextBixcomment.Text.Replace(Environment.NewLine, "<BR />");
}