Why does C# change the way a VB.Net DLL works?

Question

 Dim A As String = Chr(128)

Put this line in a VB.Net DLL
Call it from a VB program -->> it works fine.
Call it from a C# program -->> "No data is available for encoding 1252. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method." err.Number 13

Vb accepts 0 to 255 as acceptable values for Chr() but C# breaks the code with a fatal error if the value is above 127.

Why? Why does C# break the code inside the VB.Net DLL?

What other VB functions are affected by C#?

========== Thanks to Charlyface for asking me to add the full exception message. I had been looking at the error the DLL was raising in C# but not the one in VB. The error has given me an idea for the solution...

"fatal error" what error? Please edit and add the full exception message — Charlieface
– Charlieface, Commented Sep 5, 2022 at 16:52
Looks like it calls Encoding.GetEncoding(GetLocaleCodePage()) which might be causing some issue github.com/microsoft/referencesource/blob/… Quite why you want to use Chr in the first place is a different question, it's a holdover from VB6 — Charlieface
– Charlieface, Commented Sep 5, 2022 at 16:55
The following may be helpful: Can I add a reference to a .NET Framework DLL from a .NET 6 project?, .NET Standard, and Convert.ToChar Method. — It all makes cents
– It all makes cents, Commented Sep 5, 2022 at 21:08

Jeremy Caney · Accepted Answer · 2022-09-12 00:23:00Z

1

Solution to problem.

Upgrade project to .NET 6 (https://dotnet.microsoft.com/en-us/platform/upgrade-assistant/tutorial/install-upgrade-assistant)

Add System.Text.Encoding.CodePages NuGet package to solution

Register encoding in startup.

Create a global variable (Encod in the sample) and assign to encoding in startup

Encoding.RegisterProvider(CodePagesEncodingProvider.Instance)
Encod = Encoding.GetEncoding(1252)

edited Sep 12, 2022 at 0:23

Jeremy Caney

7,808115 gold badges57 silver badges86 bronze badges

answered Sep 7, 2022 at 10:38

Gary

294 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Why does C# change the way a VB.Net DLL works?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related