Satellite Assemblies not found.

[SteelDragon348]

I was working with the control in VS 2022 on Windows 11 with no problems. Now, for no apparent reason I am getting :

I am basically not able to go forward with this control.

For Example:
Using the 1 of the paths from the dialog.
C:\Users\dlond\AppData\Local\Microsoft\VisualStudio\17.0_7310d896\WinFormsDesigner\pkytdjle.onm\runtimes\win-x64\native

I found that the path : C:\Users\dlond\AppData\Local\Microsoft\VisualStudio\17.0_7310d896\WinFormsDesigner\ is static but the remainder is randomly generated so I have no way to place any assemblies in this location.

I am very confused as there is not much help out there for this problem.
I have created environment variables and place the assemblies from the package in the proper location, but, it has not helped.

Thank you

[desjarlais]

@SteelDragon348 if you create a new test app and add the control, do you see the same issue?

[SteelDragon348]

I am able to successfully drag it on the form, (Improvement), but, when I save then close the project and reopen it, the control is gone so I have to readd it and I get the error message again after dragging the control back onto the form.

[desjarlais]

I have the following version of VS2022:
Microsoft Visual Studio Community 2022 (64-bit) - Current
Version 17.14.27 (February 2026)

I'm not seeing the issue reproduce in a new .NET Core app. I created a new project, dragged the control to the form, saved, closed, reopened and the control is still visible. Do you notice this with any other controls? Does it repro with both .NET Framework and .NET Core?

[SteelDragon348]

I have a licensed VS 2022. Details are below. At the moment I am only seeing this behavior with the Scintilla control. I am willing to arrange Teams shared screen session. ***@***.*** From: Brandon Desjarlais ***@***.***> Sent: Saturday, February 28, 2026 11:59 PM To: desjarlais/Scintilla.NET ***@***.***> Cc: Dave Londeck ***@***.***>; Mention ***@***.***> Subject: Re: [desjarlais/Scintilla.NET] Satellite Assemblies not found. (Issue #171) [https://avatars.githubusercontent.com/u/9721728?s=20&v=4]desjarlais left a comment (desjarlais/Scintilla.NET#171)<#171 (comment)> I have the following version of VS2022: Microsoft Visual Studio Community 2022 (64-bit) - Current Version 17.14.27 (February 2026) I'm not seeing the issue reproduce in a new .NET Core app. I created a new project, dragged the control to the form, saved, closed, reopened and the control is still visible. Do you notice this with any other controls? Does it repro with both .NET Framework and .NET Core? - Reply to this email directly, view it on GitHub<#171 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AB7C7F6LXB627HCAGNJRPSD4OJWZFAVCNFSM6AAAAACWCF43BCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSNZZGEYDMMRVGI>. You are receiving this because you were mentioned.Message ID: ***@***.******@***.***>>

[desjarlais]

Email addresses are blocked from being displayed. Can you capture the full error call stack when you notice this problem?

[SteelDragon348]

The error I am getting is not a execution error. This error occurs in design mode just after I drop the control on the form. ***@***.*** From: Brandon Desjarlais ***@***.***> Sent: Monday, March 2, 2026 6:33 PM To: desjarlais/Scintilla.NET ***@***.***> Cc: Dave Londeck ***@***.***>; Mention ***@***.***> Subject: Re: [desjarlais/Scintilla.NET] Satellite Assemblies not found. (Issue #171) [https://avatars.githubusercontent.com/u/9721728?s=20&v=4]desjarlais left a comment (desjarlais/Scintilla.NET#171)<#171 (comment)> Email addresses are blocked from being displayed. Can you capture the full error call stack when you notice this problem? - Reply to this email directly, view it on GitHub<#171 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AB7C7FYCWD5G7QJ2RL7R3BL4OYKZPAVCNFSM6AAAAACWCF43BCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSOBXGYZDMOBZG4>. You are receiving this because you were mentioned.Message ID: ***@***.******@***.***>>

[ahmetsait]

@SteelDragon348 Create a minimal reproducable project where the designer throws an exception and upload the project folder here as a zip file.

As for a little bit of explanation, you are not supposed to copy DLLs into any of those locations mentioned in the error message. That should happen automatically while using the Scintilla5.NET nuget package.

[SteelDragon348]

Scintilla-Demo.zip
My Demo is attached. Thank you in advance.

[ahmetsait]

I was not able to reproduce anything you described, sorry.

@SteelDragon348 Can you check if %USERPROFILE%\.nuget\packages\scintilla5.net\6.1.1\runtimes\win-x64\native folder exists and what's inside it?

[SteelDragon348]

***@***.*** From: Ahmet Sait ***@***.***> Sent: Wednesday, March 4, 2026 4:32 AM To: desjarlais/Scintilla.NET ***@***.***> Cc: Dave Londeck ***@***.***>; Mention ***@***.***> Subject: Re: [desjarlais/Scintilla.NET] Satellite Assemblies not found. (Issue #171) [https://avatars.githubusercontent.com/u/8372246?s=20&v=4]ahmetsait left a comment (desjarlais/Scintilla.NET#171)<#171 (comment)> I was not able to reproduce anything you described, sorry. @SteelDragon348<https://github.com/SteelDragon348> Can you check if %USERPROFILE%\.nuget\packages\scintilla5.net\6.1.1\runtimes\win-x64\native folder exists and what's inside it? - Reply to this email directly, view it on GitHub<#171 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AB7C7F7MSJAJZ25YA6RXPE34O7Z2FAVCNFSM6AAAAACWCF43BCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSOJWGMZDOMJVHE>. You are receiving this because you were mentioned.Message ID: ***@***.******@***.***>>

[desjarlais]

@SteelDragon348 I don't repro with that project either, can you answer the folder exists question from @ahmetsait ?