Hi,
try this code for converting time format
string dfrmt = "Fri Jul 15 19:22:31 2011";
string[] sd = dfrmt.Split(' ');
string dt = System.DateTime.Now.ToString();
int month = DateTime.Parse("1." + sd[1] + " 2008").Month;
DateTime dth = new DateTime(int.Parse(sd[4]), month, int.Parse(sd[2]), int.Parse(sd[3].Split(':')[0]), int.Parse(sd[3].Split(':')[1]), int.Parse(sd[3].Split(':')[2]));
string st = month + "/" + sd[2] + "/" + sd[4] + " " + dth.ToLocalTime().ToLongTimeString();
By using this code you can convert your required datetime format
All the Best