玩得不开心。
PM>命令运行
Scaffold-DbContext "Server=myserver;Database=mysqlserverdb;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -Tables Settings -verbose
错误：
未实现该方法或操作。
System.NotImplementedException: The method or operation is not implemented.
at Microsoft.EntityFrameworkCore.Scaffolding.ProviderCodeGenerator.GenerateUseProvider(String connectionString)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateOnConfiguring(String connectionString, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.GenerateClass(IModel model, String contextName, String connectionString, Boolean useDataAnnotations, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpDbContextGenerator.WriteCode(IModel model, String namespace, String contextName, String connectionString, Boolean useDataAnnotations, Boolean suppressConnectionStringWarning)
at Microsoft.EntityFrameworkCore.Scaffolding.Internal.CSharpModelGenerator.GenerateModel(IModel model, String namespace, String contextDir, String contextName, String connectionString, ModelCodeGenerationOptions options)
at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable 1 个架构，IEnumerable 1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable 1 个架构筛选器，IEnumerable 1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_1.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0 1.b__0（） at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute（Action action）'
在安装 EF 高级工具和最新的核心 2.2.x.x SDK 之间，我现在能够将我的项目更改为使用 .net core 2.2 的下拉更改（以前只能执行 2.1。
然后随着Nuget更新等，它终于起作用了！