In Visual Studio 2019 Preview 2, The Web Tools team made some changes to improve extensibility features for extension developers. To standardize interfaces, the CSS, HTML, JSON and CSHTML editors renamed their assemblies as per the following table: Old New Microsoft.CSS.Core Microsoft.WebTools.Languages.Css Microsoft.CSS.Editor Microsoft.WebTools.Languages.Css.Editor Microsoft.Html.Core Microsoft.WebTools.Languages.Html Microsoft.Html.Editor Microsoft.WebTools.Languages.Html.Editor Microsoft.VisualStudio.Html.Package Microsoft.WebTools.Languages.Html.VS Microsoft.JSON.Core Microsoft.WebTools.Languages.Json Microsoft.JSON.Editor Microsoft.WebTools.Languages.Json.Editor Microsoft.VisualStudio.JSON.Package Microsoft.WebTools.Languages.Json.VS Microsoft.VisualStudio.Web.Extensions Microsoft.WebTools.Languages.Extensions Microsoft.Web.Core Microsoft.WebTools.Languages.Shared Microsoft.Web.Editor Microsoft.WebTools.Languages.Shared.Editor To avoid potential parse issues, the JSON parse tree changed behavior.


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