Server Error in '/' Application.
AjaxControlToolkit.AutoCompleteExtender missing required ServiceMethod property value for txtSearch_AutoCompleteExtender.
Parameter name: ServiceMethod
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: AjaxControlToolkit.AutoCompleteExtender missing required ServiceMethod property value for txtSearch_AutoCompleteExtender.
Parameter name: ServiceMethod

Source Error:


Line 6:               source: function (request, response) {
Line 7:                   $.ajax({
Line 8:                       url: '<%=ResolveUrl("~/Timeline.aspx/GetNames") %>',
Line 9:                           data: "{ 'prefix': '" + request.term + "'}",
Line 10:                          dataType: "json",