diff --git a/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
index 71d608a7..4f613bb9 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ClientAPI.cs
@@ -393,7 +393,10 @@ namespace IEC61850
             static extern IntPtr IedConnection_createWithTlsSupport(IntPtr tlsConfig);
 
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
-            static extern void IedConnection_destroy(IntPtr self);
+            static extern void IedConnection_destroy(IntPtr self);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern int Connection_getState(IedConnection self);
 
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern void IedConnection_setConnectTimeout(IntPtr self, UInt32 timeoutInMs);
diff --git a/dotnet/IEC61850forCSharp/ReportControlBlock.cs b/dotnet/IEC61850forCSharp/ReportControlBlock.cs
index dfdfa824..9f7b7d17 100644
--- a/dotnet/IEC61850forCSharp/ReportControlBlock.cs
+++ b/dotnet/IEC61850forCSharp/ReportControlBlock.cs
@@ -131,7 +131,11 @@ namespace IEC61850
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern void ClientReportControlBlock_setPurgeBuf (IntPtr self, [MarshalAs(UnmanagedType.I1)] bool purgeBuf);
 
-			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            [return: MarshalAs(UnmanagedType.I1)]
+            static extern bool ClientReportControlBlock_hasResvTms(IntPtr self);
+
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern Int16 ClientReportControlBlock_getResvTms (IntPtr self);
 
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]