'System.Web.Security.Roles.GetRolesForUser(string)' has some invalid arguments

 
Server Error in '/' Application. Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1502: The best overloaded method match for 'System.Web.Security.Roles.GetRolesForUser(string)' has some invalid arguments

Source Error:


Line 111: <asp:TemplateField HeaderText="Role"> Line 112: <ItemTemplate> Line 113: <asp:Label ID="MembersRoleLabel" runat="server" Text='<%# string.Join("<br /> ", Roles ...