Inicialmente utilizei o pacote Microsoft.EntityFrameworkCore.Tools versão mais recente (3.1.0), porém foram aparecendo erros ao realizar o comando Add-Migration Unidade e não consigo sair desse erro que mostro abaixo:
PM> Add-Migration Unidade
System.MissingMethodException: Construtor no tipo 'Microsoft.EntityFrameworkCore.Design.OperationExecutor' n�o encontrado. em System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) em System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) em System.Activator.CreateInstance(String assemblyString, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark) em System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) em System.AppDomain.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) em System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) em System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) em Microsoft.EntityFrameworkCore.Tools.AppDomainOperationExecutor..ctor(String assembly, String startupAssembly, String projectDir, String contentRootPath, String dataDirectory, String rootNamespace, String environment) em Microsoft.EntityFrameworkCore.Tools.Commands.ProjectCommandBase.CreateExecutor() em Microsoft.EntityFrameworkCore.Tools.Commands.MigrationsAddCommand.Execute() em Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args) em Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args) Construtor no tipo 'Microsoft.EntityFrameworkCore.Design.OperationExecutor' n�o encontrado.