Error message

Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /home/virtwww/w_code-sampc3e_56a7b680/http/includes/common.inc).

Call type members using dynamic type in C#

dynamic d = "some string";
d = d.ToUpper();
//d is "SOME STRING"

d = 3.14;
var s = d.ToString();

s = d.Tostring(); //<- RunTime error