字符串里提取数字！！！谁第一个回答分数都给他

Question

string i = "fdsafd""sagdfsadfdfds/fds!df123456789587542fdsafdsa/fdsadf#fdf";
我想提取出来123456789587542数字 就是在字符串里面提取数字 

Answer 1

System.Text.RegularExpressions.Regex.Replace(@"fdsafd""sagdfsadfdfds/fds!df123456789587542fdsafdsa/fdsadf#fdf", @"[^\d]", "")

Answer 2

 string i = "fdsafdsagdfsadfdfds/fds!df123456789587542fdsafdsa/fdsadf#fdf";
            string pattern = @"\D+(?<day>\d+)\D+";
            Match match1 = Regex.Match(i, pattern, RegexOptions.Multiline);
            string aa22 = Regex.Match(i, pattern, RegexOptions.Multiline).Result("$1").ToString().Trim();
            MessageBox.Show(aa22);