diff --git a/ffi/dotnet-idsdk/IoticsIdLib/src/Tools.cs b/ffi/dotnet-idsdk/IoticsIdLib/src/Tools.cs
index 3b0b557..3915c49 100644
--- a/ffi/dotnet-idsdk/IoticsIdLib/src/Tools.cs
+++ b/ffi/dotnet-idsdk/IoticsIdLib/src/Tools.cs
@@ -3,10 +3,10 @@ namespace IOTICS;
 class Tools {
     
     
-    public static string InvokeGoFunction(Func<IdLib.Return> goFunction)
+    public static string InvokeGoFunction(Func<IdLib.StringAndError> goFunction)
     {
         string? error;
-        IdLib.Return result;
+        IdLib.StringAndError result;
 
         try
         {
diff --git a/ffi/dotnet-idsdk/IoticsIdLib/src/id/IdLib.cs b/ffi/dotnet-idsdk/IoticsIdLib/src/id/IdLib.cs
index c2aaf7a..90f112d 100644
--- a/ffi/dotnet-idsdk/IoticsIdLib/src/id/IdLib.cs
+++ b/ffi/dotnet-idsdk/IoticsIdLib/src/id/IdLib.cs
@@ -5,7 +5,7 @@ Wrapper class that loads the DLL and exposes the methods as C# code.
 */
 internal partial class IdLib
 {
-    // Define the struct that matches the return type of CreateDefaultSeed in Go
+    // Define the struct that matches the return type of most of the functions below
     [StructLayout(LayoutKind.Sequential)]
     public struct Return
     {
@@ -158,7 +158,7 @@ public static partial Return CreateTwinDidWithControlDelegation(
             return null;
 
         string? result = Marshal.PtrToStringAnsi(ptr);
-        FreeUpCString(ptr); // Assuming your Go library has a function to free the allocated memory
+        FreeUpCString(ptr);
         return result;
     }