asp.net - Error with ScriptManager -


hi have following code: 

scriptmanager.registerstartupscript (page, page.gettype (), guid.newguid () tostring (), "document.getelementbyid ('divwarning') innerhtml = 'my_message';", true);

when write same method in class of specific routines (my_tools.cs), method not work: 

public static void showerro (page pag, string error)  {      scriptmanager.registerstartupscript (pag, pag.gettype (), guid.newguid () tostring (), "document.getelementbyid ('divwarning') innerhtml =. '" + error + "';"., true);  }

what reason not working when inside class instead of calling directly on page?


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