diff --git a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
index d5184020..3dd82129 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
@@ -1223,6 +1223,40 @@ namespace IEC61850
             }
         }
 
+        public class GSEControlBlock
+        {
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern IntPtr GSEControlBlock_create(string name, IntPtr parent, string appId, string dataSet, UInt32 confRev,
+                [MarshalAs(UnmanagedType.I1)] bool fixedOffs, int minTime, int maxTime);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern void GSEControlBlock_addPhyComAddress(IntPtr self, IntPtr phyComAddress);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern IntPtr PhyComAddress_create(byte vlanPriority, UInt16 vlanId, UInt16 appId, [Out] byte[] buf);
+
+            internal IntPtr self = IntPtr.Zero;
+
+            public GSEControlBlock(string name, LogicalNode parent, string appId, string dataSetName, UInt32 confRev, bool fixedOffs, int minTime, int maxTime)
+            {
+                self = GSEControlBlock_create(name, parent.self, appId, dataSetName, confRev, fixedOffs, minTime, maxTime);
+            }
+
+            public void AddPhyComAddress(PhyComAddress addr)
+            {
+                IntPtr phyComAddrPtr = PhyComAddress_create(addr.vlanPriority, addr.vlanId, addr.appId, addr.dstAddress);
+
+                if (phyComAddrPtr != IntPtr.Zero)
+                {
+                    GSEControlBlock_addPhyComAddress(self, phyComAddrPtr);
+                }
+                else
+                {
+                    Console.WriteLine("ERROR: Failed to create native PhyComAddress instance!");
+                }
+            }
+        }
+
         public class ClientConnection 
         {
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]