c# - Membership.GetUser -> Membership doesn't contain a definition for 'GetUser'. What have I missed? -

membershipuser newuser = membership.getuser(createuserwizard1.username);

i red line under getuser , when hover on it, message appears:

membership doesn't contain definition 'getuser'

when click small dash below getuser get:

generate method stub 'getuser' in 'membership

what have missed?

aspx:

<asp:createuserwizard id="createuserwizard1" runat="server" oncreateduser="createuserwizard1_createduser" >     <wizardsteps>         <asp:createuserwizardstep id="createuserwizardstep1" runat="server">         </asp:createuserwizardstep>         <asp:completewizardstep id="completewizardstep1" runat="server">         </asp:completewizardstep>     </wizardsteps> </asp:createuserwizard> 

code behind:

using system; using system.collections.generic; using system.linq; using system.web; using system.web.ui; using system.web.ui.webcontrols; using system.web.security;  public partial class signup : system.web.ui.page {     protected void page_load(object sender, eventargs e)     {      }      protected void createuserwizard1_createduser(object sender, eventargs e)     {         membershipuser newuser = membership.getuser(createuserwizard1.username);         guid newuserid = (guid)newuser.provideruserkey;     } } 

the problem due existence of class same name membership. 1 defined doesn't have definition method getuser.
need code work call full namespace of classmembership differentiate between two; alreadey defined 1 , intended one. intended 1 can referred by: system.web.security.membership

instead of this: membershipuser newuser = membership.getuser(createuserwizard1.username);

use this:
membershipuser newuser = system.web.security.membership.getuser(createuserwizard1.username);