--- title: "How to Add a .NET Core 3.0 Custom Control to Your Visual Studio Toolbox in Less Than 3 Minutes" published_at: "2020-02-13T12:25:43+00:00" modified_at: "2024-11-20T13:15:24+00:00" url: "https://www.syncfusion.com/blogs/post/add-net-core-3-0-custom-control-to-your-visual-studio-toolbox" excerpt: "If you are looking to configure .NET Core custom controls in your Visual Studio toolbox, this article is right for you. I’ll guide you through configuring a .NET Core 3.0 custom control in Visual Studio 2019, available as a NuGet..." taxonomy_category: - ".NET Core" - "Visual Studio" taxonomy_post_tag: - ".NET Core 3.0" - "Custom control" - "Visual Studio 2019" - "Visual Studio toolbox" --- # How to Add a .NET Core 3.0 Custom Control to Your Visual Studio Toolbox in Less Than 3 Minutes [Manivannan Sundararajan](https://www.syncfusion.com/blogs/author/manivannan-sundararajan) ![Adding .NET Core 3.0 custom controls in VS toolbox](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Adding-.NET-Core-3.0-custom-controls-in-VS-toolbox.png) If you are looking to configure [.NET Core](https://en.wikipedia.org/wiki/.NET_Core) custom controls in your [Visual Studio toolbox](https://docs.microsoft.com/en-us/visualstudio/ide/reference/toolbox?view=vs-2019) , this article is right for you. I’ll guide you through configuring a .NET Core 3.0 custom control in Visual Studio 2019, available as a NuGet package. Following are the prerequisites for the toolbox configuration: - Visual Studio 2019 (update 16.3.1 and later) - .NET Core SDK 3.0 ## NuGet structure to support .NET Core 3.0 toolbox The custom control will be populated in the toolbox only if the NuGet package has the **VisualStudioToolsManifest** file inside the tools folder. The tools folder will be present parallel to the lib folder inside the NuGet package. Refer to this [link](https://docs.microsoft.com/en-us/nuget/guides/create-ui-controls#add-toolboxassets-pane-support-for-xaml-controls) for more information about the structure of the VisualStudioToolsManifest file. For the normal working of the NuGet package, this VisualStudioToolsManifest file isn’t necessary. Its only purpose is to configure a custom control in the Visual Studio toolbox. Add this file in the right location during NuGet packaging. You can find the structure of the VisualStudioToolsManifest file in the following image.![Structure of Visual Studio Tools Manifest](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Structure-of-Visual-Studio-Tools-Manifest.png) - The Reference attribute points to the name of the assembly. - ContainsControls attribute specifies whether there are any controls to be listed in the Visual Studio toolbox for the given assembly. - VSCategory/BlendCategory is the name for the toolbox to be displayed in Visual Studio. - Type is the fully qualified name for the control including the namespace. ## Install NuGet Install NuGet to check if it adds the control to toolbox: 1. Create a .NET Core project in the platform you intend to configure the .NET Core 3.0 controls in your toolbox.![Create a new project dialog](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Create-a-new-project-dialog.png) 2. Ensure that the target framework is set to .NET Core 3.0.![Setting target framework to .NET Core 3.0](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Setting-target-framework-to-.NET-Core-3.0.png) 3. Right-click the project and select the **Manage NuGet Packages**… option.![Manage NuGet Package Option](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Manage-NuGet-Package-Option.png) 4. The**NuGet Package Manager** window will open. Navigate to the **Browse** tab and search for the NuGet package that has .NET Core 3.0 support. 5. Select the NuGet package and click **Install**.![Installing the NuGet package](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Installing-the-NuGet-package.png) 6. A confirmation message will be displayed. Click **OK**. The Output window will display the NuGet installation details followed by a completion message.![Installation completion message in Output Window](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Installation-completion-message-in-Output-Window.png) 7. Now, open Visual Studio toolbox to check if the control is displayed in it.![Control listed in the VS Toolbox](https://www.syncfusion.com/blogs/wp-content/uploads/2020/02/Control-listed-in-the-VS-Toolbox.png) The control’s name will be displayed along with its Namespace. **Control name (Namespace)** ## Conclusion I hope this blog was helpful in configuring your NuGet package to list custom controls in the Visual Studio toolbox for .NET Core 3.0. Syncfusion provides 70+ high-performance, lightweight, modular, and responsive [ASP.NET Core UI controls](https://www.syncfusion.com/aspnet-core-ui-controls) such as [DataGrid](https://www.syncfusion.com/aspnet-core-ui-controls/grid) , [Charts](https://www.syncfusion.com/aspnet-core-ui-controls/charts) , and [Scheduler](https://www.syncfusion.com/aspnet-core-ui-controls/scheduler) . You can use them to improve your application development. Please share your feedback in the comments section. You can also contact us through our [support forum](https://www.syncfusion.com/forums) , [Direct-Trac](https://www.syncfusion.com/account/login) , or [feedback portal](https://www.syncfusion.com/feedback) . We are waiting to hear your feedback!