Import of type 'Color' from assembly or module 'System.Drawing.Primitives.dll' failed

Question

Import of type 'Color' from assembly or module 'System.Drawing.Primitives.dll' failed

Simon 466

I created a project with ASP.NET Visual Studio 2022 .NET Framework Version 4.8.1 I imported all .dll files from Framework version 4.8.1. Anything that has code referring to 'Color' generates the following error message. Error BC31091 Import of type 'Color' from assembly or module 'System.Drawing.Primitives.dll' failed Which direction should I take to resolve this issue?

AgaveJoe 30,126 Reputation points

2024-02-29T18:25:10.56+00:00

It would help if you explained why you need a library usually found in desktop applications in a Web Application and why you "imported all .dll files from Framework version 4.8.1". It would also help if you explained what kind of application you are building.
Simon 466 Reputation points

2024-02-29T19:38:44.7+00:00

I imported from a desktop application for rent management. I want to use the upgrade tool from Microsoft to convert the desktop version into a web application. The reason why I imported all the refences from Framework version 4.8.1 is because I treid doing it without importing the refences from Framework version 4.8.1 and it was generating the same color error. The following will give you a clear picture what I included in this project. Microsoft Visual Studio Enterprise 2022 Version 17.8.7 VisualStudio.17.Release/17.8.7+34601.278 Microsoft .NET Framework Version 4.8.09032 Installed Version: Enterprise ActiveReports 17 17.2.2.0 The first report writer for Microsoft .NET ADL Tools Service Provider 1.0 This package contains services used by Data Lake tools ASA Service Provider 1.0 ASP.NET and Web Tools 17.8.358.6298 ASP.NET and Web Tools Azure App Service Tools v3.0.0 17.8.358.6298 Azure App Service Tools v3.0.0 Azure Data Lake Tools for Visual Studio 2.6.5000.0 Microsoft Azure Data Lake Tools for Visual Studio Azure Functions and Web Jobs Tools 17.8.358.6298 Azure Functions and Web Jobs Tools Azure Stream Analytics Tools for Visual Studio 2.6.5000.0 Microsoft Azure Stream Analytics Tools for Visual Studio C# Tools 4.8.0-7.23572.1+7b75981cf3bd520b86ec4ed00ec156c8bc48e4eb 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. EmptyLine Extension 22 2.1 Visual Studio extension for remove empty lines (more than one consecutive empty line) Insert C1 MVC Control Extension 1.0 Insert C1 MVC Control Extension Microsoft Azure Hive Query Language Service 2.6.5000.0 Language service for Hive query Microsoft Azure Stream Analytics Language Service 2.6.5000.0 Language service for Azure Stream Analytics Microsoft Azure Tools for Visual Studio 2.9 Support for Azure Cloud Services projects Microsoft JVM Debugger 1.0 Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines Node.js Tools 1.5.50908.1 Commit Hash:c294679b821c4b8f7f9c6db3827b7655db80fc28 Adds support for developing and debugging Node.js apps in Visual Studio NuGet Package Manager 6.8.1 NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/ Razor (ASP.NET Core) 17.8.3.2405201+d135dd8d2ec1c2fbdee220e8656b308694e17a4b Provides languages services for ASP.NET Core Razor. SQL Server Data Tools 17.8.120.1 Microsoft SQL Server Data Tools ToolWindowHostedEditor 1.0 Hosting json editor into a tool window TypeScript Tools 17.0.20920.2001 TypeScript Tools for Microsoft Visual Studio Visual Basic Tools 4.8.0-7.23572.1+7b75981cf3bd520b86ec4ed00ec156c8bc48e4eb 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 17.8.0-beta.23475.2+10f956e631a1efc0f7f5e49c626c494cd32b1f50 Microsoft Visual F# Tools Visual Studio IntelliCode 2.2 AI-assisted development for Visual Studio. There may be a conflilct between the above and I'm hoping that you will be able to resolve it. Looking forward to your reply. Thank you
AgaveJoe 30,126 Reputation points

2024-02-29T19:47:52.5466667+00:00

Desktop and web application are very different. The migration processes requires an extensive analysis to figure out which pieces of the desktop application can be reused and what pieces need rework. Most likely you need to recode most of the applications. Certainly the UI needs to be rewritten.

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AgaveJoe 30,126 Reputation points

2024-02-29T18:25:10.56+00:00

It would help if you explained why you need a library usually found in desktop applications in a Web Application and why you "imported all .dll files from Framework version 4.8.1". It would also help if you explained what kind of application you are building.
AgaveJoe 30,126 Reputation points

2024-02-29T19:47:52.5466667+00:00

Desktop and web application are very different. The migration processes requires an extensive analysis to figure out which pieces of the desktop application can be reused and what pieces need rework. Most likely you need to recode most of the applications. Certainly the UI needs to be rewritten.

Answer 1

Hi @Simon,

Import of type 'Color' from assembly or module 'System.Drawing.Primitives.dll' failed

I guess the reason for your error is that you are using an incorrect dll.Maybe you could try using System.Drawing.dll instead.

Provides basic drawing primitive structures, that exposes the corresponding System.Drawing.dll types in .NET Core.

https://learn.microsoft.com/en-us/dotnet/api/system.drawing.color?view=netframework-4.8.1

User's image

I want to use the upgrade tool from Microsoft to convert the desktop version into a web application.

It is not recommended to use tools for conversion. Web applications and WinForms are fundamentally different and should be designed differently.

Best regards,
Lan Huang

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Import of type 'Color' from assembly or module 'System.Drawing.Primitives.dll' failed

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