update

MySolution/STcpHelper/Utility/SEncoding.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STcpHelper.Utility
+{
+    internal class SEncoding
+    {
+        public static string GetString(byte[] bytes, int index, int length)
+        {
+            return Encoding.UTF8.GetString(bytes, index, length);
+        }
+
+        public static byte[] GetBytes(string s)
+        {
+            return Encoding.UTF8.GetBytes(s);
+        }
+    }
+}