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Failed to load assembly: Infragistics.Win.v25.1.Design, Version=25.1.20251.63
posted

I've just installed Infragistics on a new laptop and created an application. Everything seemed fine but yesterday and today I open the project and I am not able to select or edit any Infragistics controls. I ran Update-Package to see if that would fix anything and I was able to work with Infragistics controls again.

Then it went weird while customizing a toolbar and now I am at an even worse point because none of the columns in my grid exist anymore. The screenshot is from when the problem first started and now it's worse as none of my stored columns exist.

Is there something I am doing wrong? It's extremely frustrating to never know when my application is going to be rendered useless.

Infragistics.25.1.63

Microsoft Visual Studio Community 2022
Version 17.14.13 (August 2025)
VisualStudio.17.Release/17.14.13+36414.22.-august.2025-
Microsoft .NET Framework
Version 4.8.09032

Installed Version: Community

ASP.NET and Web Tools 17.14.122.59099
ASP.NET and Web Tools

Azure App Service Tools v3.0.0 17.14.122.59099
Azure App Service Tools v3.0.0

C# Tools 4.14.0-3.25412.6+c167adef821b9ba2f1c44c227a5e79ca11876461
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools 1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Cookiecutter 17.0.25079.8
Provides tools for finding, instantiating and customizing templates in cookiecutter format.

GitHub Copilot 17.14.1091.29919
GitHub Copilot is an AI pair programmer that helps you write code faster and with less work.

Microsoft JVM Debugger 1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

NuGet Package Manager 6.14.1
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

Python - Profiling support 17.0.25079.8
Profiling support for Python projects.

Python with Pylance 17.0.25079.8
Provides IntelliSense, projects, templates, debugging, interactive windows, and other support for Python developers.

Razor (ASP.NET Core) 17.14.3.2530601+3372435431977e91904a23ceb1eab689badc1bd9
Provides languages services for ASP.NET Core Razor.

SQL Server Data Tools 17.14.26.0
Microsoft SQL Server Data Tools

TypeScript Tools 17.0.40502.2001
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools 4.14.0-3.25412.6+c167adef821b9ba2f1c44c227a5e79ca11876461
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Visual F# Tools 17.14.0-beta.25230.7+c1a9d78ad4a474a716ccffb4367ed5151e3f7c9f
Microsoft Visual F# Tools

Visual Studio IntelliCode 2.2
AI-assisted development for Visual Studio.

Parents
  • 7615
    Offline posted

    Hello,

    Thank you for your post. I would like to know if you using dlls or packages in the application?

    Also if you created .netframwork application or .net8/9 application ?

    In Winforms, you can use packages for ,net core /.net8/9 applications and dlls for ,net framework 4+ application only.

    Looking at the image you shared with the email , all your controls are at the bottom tray , this makes me think that this is missing designer dlls issue , 1st remove all the entries from your .licx file and also select all the dlls and rightclick open property window set specific version to false , copy local to false , clean and rebuild the application .Like this (for example)

    This should fix the issue.

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