The project.json file is used in .NET Core projects, and it was replaced by the .csproj file in .NET Framework projects. Therefore, if you are developing a Visual Studio Extension (VSIX) for a .NET Framework project, you need to add package references to the .csproj file.
Here are the steps to add package references to the .csproj file:
Right-click on the project in Solution Explorer and select "Unload Project".
Right-click on the unloaded project and select "Edit <project-name>.csproj".
Add a new ItemGroup element for the package references, for example:
<ItemGroup> <PackageReference Include="Newtonsoft.Json" Version="13.0.1" /> </ItemGroup>
Replace Newtonsoft.Json with the name of the package you want to reference, and 13.0.1 with the version you want to use.
Save the changes to the .csproj file and reload the project by right-clicking on it and selecting "Reload Project".
Once you have added the package reference to the .csproj file, you can use NuGet Package Manager to install and update the package.
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project.json for a VSIX project.// Example project.json file with a specified package version { "dependencies": { "Newtonsoft.Json": "9.0.1" }, // Other project.json settings... } Understand how to specify the version of a NuGet package in the dependencies section.
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project.json.// Example project.json file with package references and settings { "dependencies": { "Newtonsoft.Json": "9.0.1" }, "frameworks": { "netcoreapp1.0": { "dependencies": { "Microsoft.NETCore.App": { "type": "platform", "version": "1.0.1" } } } } } Find information on effective package management strategies for project.json.
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Find information on transitioning from project.json to the new .csproj format.
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