使用VSCode开发.NET Core MVC项目，在Solution Explorer的项目目录文件夹右键创建新文件时，会在输入框提示选择模板创建文件，输入文件名点Enter回车后，文件没有创建成功，而是报错了。
Error running command csdevkit.addNewFile: Failed with ExitCode(2097158)
Details
No templates found matching: 'class'.
To list installed templates, run:
dotnet new --list
To search for the templates on NuGet.org, run:
dotnet new class --search
. This is likely caused by the extension that contributes csdevkit.addNewFile.
解决方法：
根据错误提示，命令行输入
dotnet new --list输出如下结果：
搜索出了已经安装的模板。
These templates matched your input:
Template Name Short Name Language Tags
-------------------------------------------- ------------------- ---------- -------------------------------------
ASP.NET Core Empty web [C#],F# Web/Empty
ASP.NET Core gRPC Service grpc [C#] Web/gRPC
ASP.NET Core Web API webapi [C#],F# Web/WebAPI
ASP.NET Core Web App webapp,razor [C#] Web/MVC/Razor Pages
...
为省略篇幅，略去部分。看上去是因为没有安装Class的模板。
接下去输入下面的命令：
dotnet new class --search输出如下结果：
Searching for the templates...
Matches from template source: NuGet.org
These templates matched your input: 'class'
Template Name Short Name Author Language Package Downloads
--------------------------------------------- ------------------------------------ --------------------------------- -------- ----------------------------------------- ---------
Backlang Class backclass Me Backlang Backlang.Templates 21k
Basic Class Library that can be made into ... DropBear.CLT DropBear aka Terrence Kuchel [C#] DropBear.Templates.ClassLibrary <1k
Benjamin Michaelis's Class Library for NuGet benjaminmichaelis.nuget BenjaminMichaelis [C#] BenjaminMichaelis.Dotnet.Templates <1k
Blazor Hybrid Application using WPF with s... blazorwpfrcl Sathiyaraman M [C#] SathiyaramanM.BlazorWpf.Templates <1k
C# Class class Jacob Viau [C#] Vio.Dotnet.Templates 2k
...
To use the template, run the following command to install the package:
dotnet new --install <PACKAGE_ID>
Example:
dotnet new --install Microsoft.Maui.Templates
应该从NuGet.org搜索到了名字里带Class的模板。比如我现在是创建Class失败，那么我们找到Class的模板和它对应的包名为Vio.Dotnet.Templates。根据提示安装包：
dotnet new --install Vio.Dotnet.Templates那么我们安装这个包之后就能成功创建Class文件了。
