System.Net.Sockets

 namespace System.Net.Sockets {
     public class SendPacketsElement {
+        public SendPacketsElement(FileStream fileStream);
+        public SendPacketsElement(FileStream fileStream, long offset, int count);
+        public SendPacketsElement(FileStream fileStream, long offset, int count, bool endOfPacket);
+        public SendPacketsElement(string filepath, long offset, int count);
+        public SendPacketsElement(string filepath, long offset, int count, bool endOfPacket);
+        public FileStream FileStream { get; }
+        public long OffsetLong { get; }
     }
 }