Error while importing C# dll file onto console

Question

User1406963893 posted

Hello,

I'm developing a console in VB and I have to add a dll fine that programed in C#, Once I click run I get error that means I have error in reverences, I made a web application in VB and that file works white out any errors!, Should I do some thing If I have to import C# reverences to my project?

Thank you.

Answer 1

User-574293449 posted

any specific error? please explain. 

Anyway the following thread related to this

https://social.msdn.microsoft.com/Forums/vstudio/en-US/dda8d7cb-0fa1-43d6-a90f-6c4bed0b40bb/how-to-use-a-c-dll-in-visual-basic-net?forum=csharpgeneral

http://www.codeguru.com/columns/vb/calling-a-c-dll-from-vb.net.htm

Answer 2

User1406963893 posted

any specific error? please explain. 

Anyway the following thread related to this

https://social.msdn.microsoft.com/Forums/vstudio/en-US/dda8d7cb-0fa1-43d6-a90f-6c4bed0b40bb/how-to-use-a-c-dll-in-visual-basic-net?forum=csharpgeneral

http://www.codeguru.com/columns/vb/calling-a-c-dll-from-vb.net.htm

Thank you for your replay,

I have tried that but I have got same error message shown below.

System.ArgumentNullException occurred
Message: A first chance exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
Additional information: Value cannot be null.

Answer 3

User-574293449 posted

something like null exception. You c# a library project is running successfully?

Answer 4

User1406963893 posted

something like null exception. You c# a library project is running successfully?

I don't have the open source file of dll file, that file I have got it from some service provider to implement there services.

The same file I implemented on web application vb all service worked with out any errors!!!.

Answer 5

User1428246847 posted

I don't have the open source file of dll file, that file I have got it from some service provider to implement there services.

The same file I implemented on web application vb all service worked with out any errors!!!.

I assume that you know how to debug, so examine the stacktrace and your variables when you get the exception; it's very well possible that your code passes a null (whatever that is in VB) to the method in the dll.

Else, can you share a code snippet of both where you use the method of the dll that causes the issue. And add the stacktrace.