Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Unknown server tag 'mg:MGCityDropDownList'.

Source Error:


Line 10: 
Line 11: <asp:Panel runat="server" ID="DropDownListPanel" Visible="false">
Line 12: 	<mg:MGCityDropDownList ID="CityDropDownList" runat="server" CssClass="form-control form-control-lg"  Required="true" />
Line 13: 	<asp:RequiredFieldValidator runat="server" ID="ValidateCityDropDownList" CssClass="text-danger"
Line 14: 		controltovalidate="CityDropDownList" Display="Dynamic" SetFocusOnError="True" 

Source File: /Controls/CityFormField.ascx    Line: 12


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0