diff --git a/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
index 68a22ff3..b919cfeb 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
@@ -439,7 +439,12 @@ namespace IEC61850
 			static extern IntPtr MmsConnection_getIsoConnectionParameters(IntPtr mmsConnection);
 
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
-            static extern IntPtr IedConnection_getFileDirectory(IntPtr self, out int error, string directoryName);
+            static extern IntPtr IedConnection_getFileDirectory(IntPtr self, out int error, string directoryName);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern IntPtr
+            IedConnection_getFileDirectoryEx(IntPtr self, out int error, string directoryName, string continueAfter
+                , [MarshalAs(UnmanagedType.I1)] out bool moreFollows);
 
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern void IedConnection_deleteFile(IntPtr self, out int error, string fileName);
@@ -484,6 +489,15 @@ namespace IEC61850
              * Async functions
              *********************/
 
+            [DllImport ("iec61850", CallingConvention=CallingConvention.Cdecl)]
+            static extern void IedConnection_connectAsync (IntPtr self, out int error, string hostname, int tcpPort);
+
+            [DllImport ("iec61850", CallingConvention=CallingConvention.Cdecl)]
+            static extern void IedConnection_abortAsync (IntPtr self, out int error);
+
+            [DllImport ("iec61850", CallingConvention=CallingConvention.Cdecl)]
+            private static extern void IedConnection_releaseAsync(IntPtr self, out int error);
+
             [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
             private delegate void IedConnection_ReadObjectHandler (UInt32 invokeId, IntPtr parameter, int err, IntPtr value);
 
@@ -513,6 +527,11 @@ namespace IEC61850
             IedConnection_getLogicalDeviceVariablesAsync(IntPtr self, out int error, string ldName, string continueAfter, IntPtr result,
                 IedConnection_GetNameListHandler handler, IntPtr parameter);
 
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)] 
+            static extern UInt32
+            IedConnection_getLogicalDeviceDataSetsAsync(IntPtr self, out int error, string ldName, string continueAfter, IntPtr result,
+                IedConnection_GetNameListHandler handler, IntPtr parameter);
+
             [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
             private delegate void IedConnection_QueryLogHandler (UInt32 invokeId, IntPtr parameter, int err, IntPtr journalEntries, [MarshalAs(UnmanagedType.I1)] bool moreFollows);
 
@@ -686,6 +705,19 @@ namespace IEC61850
 					throw new IedConnectionException ("Connect to " + hostname + ":" + tcpPort + " failed", error);
 			}
 
+            public void ConnectAsync(string hostname, int tcpPort)
+            {
+                int error;
+
+                IedConnection_setConnectTimeout(connection, connectTimeout);
+
+                IedConnection_connectAsync (connection, out error, hostname, tcpPort);
+
+                if (error != 0)
+                    throw new IedConnectionException ("Connect to " + hostname + ":" + tcpPort + " failed", error);
+                
+            }
+
             /// <summary>
             /// Gets the current state of the connection
             /// </summary>
@@ -1294,6 +1326,41 @@ namespace IEC61850
                 LinkedList_destroyStatic(fileEntryList);
 
                 return fileDirectory;
+            }
+
+            /// <summary>Read the content of a file directory. - single request version</summary>
+            /// <param name="directoryName">The name of the directory.</param>
+            /// <exception cref="IedConnectionException">This exception is thrown if there is a connection or service error</exception>
+            /// <param name="directoryName">The name of the directory.</param>
+            public List<FileDirectoryEntry> GetFileDirectoryEx(string directoryName, string continueAfter, out bool moreFollows)
+            {
+                int error;
+
+                IntPtr fileEntryList = IedConnection_getFileDirectoryEx(connection, out error, directoryName, continueAfter, out moreFollows);
+
+                if (error != 0)
+                    throw new IedConnectionException("Reading file directory failed", error);
+
+                List<FileDirectoryEntry> fileDirectory = new List<FileDirectoryEntry>();
+
+                IntPtr element = LinkedList_getNext(fileEntryList);
+
+                while (element != IntPtr.Zero)
+                {
+                    IntPtr elementData = LinkedList_getData(element);
+
+                    FileDirectoryEntry entry = new FileDirectoryEntry(elementData);
+
+                    fileDirectory.Add(entry);
+
+                    FileDirectoryEntry_destroy(elementData);
+
+                    element = LinkedList_getNext(element);
+                }
+
+                LinkedList_destroyStatic(fileEntryList);
+
+                return fileDirectory;
             }
 
 			[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
@@ -1376,6 +1443,22 @@ namespace IEC61850
 					throw new IedConnectionException ("Abort failed", error);
 			}
 
+            /// <summary>
+            /// Abort (close) the connection - asynchronous version
+            /// </summary>
+            /// <description>This function will send an abort request to the server. This will immediately interrupt the
+            /// connection.</description>
+            /// <exception cref="IedConnectionException">This exception is thrown if there is a connection or service error</exception>
+            public void AbortAsync ()
+            {
+                int error;
+
+                IedConnection_abortAsync (connection, out error);
+
+                if (error != 0)
+                    throw new IedConnectionException ("Abort failed", error);
+            }
+
 			/// <summary>
 			/// Release (close) the connection.
 			/// </summary>
@@ -1392,6 +1475,22 @@ namespace IEC61850
 					throw new IedConnectionException ("Release failed", error);
 			}
 
+            /// <summary>
+            /// Release (close) the connection - asynchronous version
+            /// </summary>
+            /// <description>This function will send an release request to the server. The function will block until the
+            /// connection is released or an error occured.</description>
+            /// <exception cref="IedConnectionException">This exception is thrown if there is a connection or service error</exception>
+            public void ReleaseAsync ()
+            {
+                int error;
+
+                IedConnection_releaseAsync(connection, out error);
+
+                if (error != 0)
+                    throw new IedConnectionException ("Release failed", error);
+            }
+
 			/// <summary>
 			/// Immediately close the connection.
 			/// </summary>
@@ -1850,6 +1949,30 @@ namespace IEC61850
                 return invokeId;
             }
 
+            public UInt32 GetLogicalDeviceDataSetsAsync(string ldName, string continueAfter, GetNameListHandler handler, object parameter)
+            {
+                return GetLogicalDeviceDataSetsAsync(null, ldName, continueAfter, handler, parameter);
+            }
+
+
+            public UInt32 GetLogicalDeviceDataSetsAsync(List<string> result, string ldName, string continueAfter, GetNameListHandler handler, object parameter)
+            {
+                int error;
+
+                Tuple<GetNameListHandler, object, List<string>> callbackInfo = Tuple.Create(handler, parameter, result);
+
+                GCHandle handle = GCHandle.Alloc(callbackInfo);
+
+                UInt32 invokeId = IedConnection_getLogicalDeviceDataSetsAsync(connection, out error, ldName, continueAfter, IntPtr.Zero, nativeGetNameListHandler, GCHandle.ToIntPtr(handle));
+
+                if (error != 0)
+                {
+                    handle.Free();
+                    throw new IedConnectionException("Get logical device data sets failed", error);
+                }
+
+                return invokeId;
+            }
 
             public delegate void QueryLogHandler(UInt32 invokeId, object parameter, IedClientError err, List<MmsJournalEntry> journalEntries, bool moreFollows);
 
diff --git a/dotnet/files/FileServicesExample.cs b/dotnet/files/FileServicesExample.cs
index f77743fc..bdd02126 100644
--- a/dotnet/files/FileServicesExample.cs
+++ b/dotnet/files/FileServicesExample.cs
@@ -15,7 +15,9 @@ namespace files
 	{
 		public static void printFiles (IedConnection con, string prefix, string parent)
 		{
-			List<FileDirectoryEntry> files = con.GetFileDirectory (parent);
+            bool moreFollows = false;
+
+            List<FileDirectoryEntry> files = con.GetFileDirectoryEx (parent, null, out moreFollows);
 
 			foreach (FileDirectoryEntry file in files) {
 				Console.WriteLine (prefix + file.GetFileName () + "\t" + file.GetFileSize () + "\t" +
@@ -26,6 +28,8 @@ namespace files
 				}
 			}
 
+            if (moreFollows)
+                Console.WriteLine("-- MORE FILES AVAILABLE --");
 		}
 
 		static bool getFileHandler (object parameter, byte[] data)
@@ -48,7 +52,7 @@ namespace files
 			if (args.Length > 0)
 				hostname = args [0];
 			else
-				hostname = "10.0.2.2";
+				hostname = "127.0.0.1";
 
 			Console.WriteLine ("Connect to " + hostname);
 
diff --git a/examples/iec61850_client_example_files/file-tool.c b/examples/iec61850_client_example_files/file-tool.c
index 52680c44..6a53dd0a 100644
--- a/examples/iec61850_client_example_files/file-tool.c
+++ b/examples/iec61850_client_example_files/file-tool.c
@@ -79,6 +79,7 @@ basename(char* path)
 static char* hostname = "localhost";
 static int tcpPort = 102;
 static char* filename = NULL;
+static bool singleRequest = false;
 
 typedef enum {
     FileOperationType_None = 0,
@@ -116,6 +117,7 @@ printHelp()
     printf("  Options:\n");
     printf("    -h <hostname/IP>\n");
     printf("    -p portnumber\n");
+    printf("    -s single request for show (sub) directory (ignore morefollows");
     printf("  Operations\n");
     printf("     dir - show directory\n");
     printf("     subdir <dirname> - show sub directory\n");
@@ -140,6 +142,9 @@ parseOptions(int argc, char** argv)
         else if (strcmp(argv[currentArgc], "-p") == 0) {
             tcpPort = atoi(argv[++currentArgc]);
         }
+        else if (strcmp(argv[currentArgc], "-s") == 0) {
+            singleRequest = true;
+        }
         else if (strcmp(argv[currentArgc], "del") == 0) {
             operation = FileOperationType_Del;
             filename = argv[++currentArgc];
@@ -179,9 +184,15 @@ showDirectory(IedConnection con)
 {
     IedClientError error;
 
+    bool moreFollows = false;
+
     /* Get the root directory */
-    LinkedList rootDirectory =
-            IedConnection_getFileDirectory(con, &error, filename);
+    LinkedList rootDirectory;
+
+    if (singleRequest)
+        rootDirectory = IedConnection_getFileDirectoryEx(con, &error, filename, NULL, &moreFollows);
+    else
+        rootDirectory = IedConnection_getFileDirectory(con, &error, filename);
 
     if (error != IED_ERROR_OK) {
         printf("Error retrieving file directory\n");
@@ -200,6 +211,9 @@ showDirectory(IedConnection con)
 
         LinkedList_destroyDeep(rootDirectory, (LinkedListValueDeleteFunction) FileDirectoryEntry_destroy);
     }
+
+    if (moreFollows)
+        printf("\n- MORE FILES AVAILABLE -\n");
 }
 
 void
diff --git a/src/iec61850/inc/iec61850_client.h b/src/iec61850/inc/iec61850_client.h
index 0bd6f358..2a673439 100644
--- a/src/iec61850/inc/iec61850_client.h
+++ b/src/iec61850/inc/iec61850_client.h
@@ -208,6 +208,8 @@ IedConnection_createEx(TLSConfiguration tlsConfig, bool useThreads);
  * the \ref IedConnection_connect or \ref IedConnection_connectAsync method has to be called.
  * The connection will use TLS when a TLSConfiguration object is provided. The connection will be in thread mode.
  *
+ * \deprecated Use \ref IedConnection_createEx instead
+ *
  * \param tlsConfig the TLS configuration to be used
  *
  * \return the new IedConnection instance
@@ -287,6 +289,11 @@ IedConnection_connect(IedConnection self, IedClientError* error, const char* hos
 /**
  * \brief Asynchronously connect to a server
  *
+ * The function will return immediately. No error doesn't indicate that the
+ * connection is established. The current connection state has to be tracked
+ * by polling the \ref IedConnection_getState function or by using
+ * \ref IedConnection_StateChangedHandler
+ *
  * \param self the connection object
  * \param error the error code if an error occurs
  * \param hostname the host name or IP address of the server to connect to