# Installation and Package Restore > Fix package problems of TX Spell .NET for Windows Forms: packages that aren't found, the .NET 8 target, the right package for the project and old references. - **Product:** TX Spell .NET for Windows Forms - **Section:** Documentation - **Kind:** Topic - **Path:** TX Spell .NET for Windows Forms > Troubleshooting > Installation and Package Restore - **884 words** - **Web URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/installation/ - **LLMs URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/installation/llms.txt - **LLMs-Full URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/installation/llms-full.txt --- TX Spell .NET for Windows Forms comes as NuGet packages that the setup provides in the package source **Text Control Offline Packages**, and as assemblies in the *Assembly* folder of the installation for .NET Framework projects. The packages aren't published on nuget.org. Most installation problems come from the package source, the target framework or the choice of package. [Installation Guide](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/llms-full.txt) describes the installation in full. ### The Package Isn't Found Visual Studio or `dotnet restore` doesn't find `TXTextControl.TXSpell.WinForms.SDK` or `TXTextControl.TXSpell.Core.SDK`. The packages aren't on nuget.org. The setup of TX Spell .NET adds them to the package source **Text Control Offline Packages**. 1. Install the setup of the full version, *TX Spell .NET for Windows Forms 11.0 with SP1.exe*, or of the trial version on the development machine. See [Installing the Product](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/setup/llms-full.txt). 2. Choose **Project** > **Manage NuGet Packages...**, select **Text Control Offline Packages** as the package source, and search on the **Browse** tab. 3. Install the package. [Configuring Package Sources](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/nuget/sources/llms-full.txt) describes the package sources. ### The Package Doesn't Fit the Target Framework The package installs without an error in a project for the .NET Framework, .NET 5, .NET 6 or .NET 7, but the build fails: ```text error CS0246: The type or namespace name 'TXTextControl' could not be found ``` The packages of version 11.0 contain assemblies for .NET 8 only. NuGet accepts them in older projects because of the language data they contain, but adds no assembly reference. The package of version 10.0 supported .NET 5, .NET 6 and .NET 7. Projects for the .NET Framework don't use the packages: they reference the assemblies of the installation. 1. Set the target framework of a .NET project to .NET 8 or higher, then rebuild. 2. In a .NET Framework project, uninstall the package and reference *TXSpell.dll* and *TXSpell.Windows.Forms.dll* from the *Assembly* folder of the installation instead. [.NET and .NET Framework](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/requirements/dotnet/llms-full.txt) lists the supported versions. ### The Spell Checker Component Is Missing The package is installed, but the project doesn't know the `TXSpellChecker` component or its dialog boxes. The packages contain different assemblies. `TXTextControl.TXSpell.Core.SDK` contains only *TXSpell.dll*, with the class [TXSpell](https://docs.textcontrol.com/tx-spell-dotnet-winforms/reference/txtextcontrol-proofing/txspell/llms-full.txt), which checks text without a user interface. `TXTextControl.TXSpell.WinForms.SDK` adds *TXSpell.Windows.Forms.dll* with the component [TXSpellChecker](https://docs.textcontrol.com/tx-spell-dotnet-winforms/reference/txtextcontrol-proofing/txspellchecker/llms-full.txt), its dialog boxes and its context menu. 1. In a Windows Forms application, install `TXTextControl.TXSpell.WinForms.SDK`. 2. Keep `TXTextControl.TXSpell.Core.SDK` for .NET and ASP.NET Core applications without a user interface. [Package Overview](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/nuget/packages/llms-full.txt) compares the packages. ### A Sample or an Old Project Doesn't Build A sample from GitHub or a project written for an earlier version doesn't build after you installed version 11.0. The project references the assemblies of version 10.0 or 11.0, sometimes with a path to the installation directory of an earlier version, or it uses packages of an earlier version. 1. In a .NET Framework project, remove the references to the TX Spell .NET assemblies and add them again from the *Assembly* folder of your installation. 2. In a .NET project, change the target framework to .NET 8 or higher, and update the packages to version 11.0.1. 3. Rebuild the project. [Update an Older Sample](https://docs.textcontrol.com/tx-spell-dotnet-winforms/examples/github/#update-an-older-sample) describes the changes for the samples on GitHub, and [Service Packs](https://docs.textcontrol.com/tx-spell-dotnet-winforms/whats-new/service-packs/llms-full.txt) the update to Service Pack 1. ### Related Pages - [Installation Guide](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/llms-full.txt): the setup, the packages and the language data. - [Toolbox and Designer](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/toolbox/llms-full.txt): the toolbox after installing the package. - [Dictionaries Not Found](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/dictionaries/llms-full.txt): the language data the packages bring. --- ## Nearby - **Previous:** [Troubleshooting](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/llms-full.txt) - **Next:** [Toolbox and Designer](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/toolbox/llms-full.txt)