In Visual Studio 2017, if I copy
<asp:PlaceHolder ID="userControl1" runat="server">
and then try to paste it, it comes out as
<asp:PlaceHolder ID="Placeholder[n]" runat="server"></asp:PlaceHolder>
where [n]
is some whole number; however, when I paste it into any other application, it comes out correct.
How should I approach solving this problem? Is it possible an extension is the culprit?