开发环境：

WIN7   64   旗舰

VS2017

PowerShell 3.0

使用EF的Database First模式（已经存在数据库，在VS中使用EF将表映射为Models）

按照微软官方的教程之前的几个命令：

Install-Package Microsoft.EntityFrameworkCore.SqlServer

Install-Package Microsoft.EntityFrameworkCore.Tools

Install-Package Microsoft.EntityFrameworkCore.SqlServer.Design

都顺利执行完毕，在执行：

Scaffold-DbContext "Server=(local);Database=PADAccountLD;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -Verbose

时出错，完整的错误提示是：

Using project 'PADBS.Models'.
Using startup project 'PADBrushSystem'.
Build started...
Build succeeded.
E:\CSharp\Projects\PADBrushSystem\packages\Microsoft.EntityFrameworkCore.Tools.1.1.1\tools\net451\ef.exe dbcontext scaffold Server=(local);Database=PADAccountLD;Trusted_Connection=True; Microsoft.EntityFrameworkCore.SqlServer --json --verbose --no-color --prefix-output --assembly E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug\PADBS.Models.dll --startup-assembly E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug\PADBrushSystem.exe --project-dir E:\CSharp\Projects\PADBrushSystem\PADBS.Models\PADBS.Models\ --content-root E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\ --data-dir E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug\ --root-namespace PADBS.Models
Using assembly 'PADBS.Models'.
Using startup assembly 'PADBrushSystem'.
Using application base 'E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug'.
Using content root 'E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\'.
Using root namespace 'PADBS.Models'.
Using project directory 'E:\CSharp\Projects\PADBrushSystem\PADBS.Models\PADBS.Models\'.
Using data directory 'E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug\'.
Using configuration file 'E:\CSharp\Projects\PADBrushSystem\PADBrushSystem\bin\Debug\PADBrushSystem.exe.config'.
System.IO.FileNotFoundException: δ�ܼ����ļ�����򼯡�Microsoft.EntityFrameworkCore.Design��������ijһ�������ϵͳ�Ҳ���ָ�����ļ���
�ļ���:��Microsoft.EntityFrameworkCore.Design��
�� System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
�� System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
�� System.Activator.CreateInstance(String assemblyString, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
�� System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
�� System.AppDomain.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
�� System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
�� System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
�� Microsoft.EntityFrameworkCore.Tools.AppDomainOperationExecutor..ctor(String assembly, String startupAssembly, String projectDir, String contentRootPath, String dataDirectory, String rootNamespace, String environment)
�� Microsoft.EntityFrameworkCore.Tools.Commands.ProjectCommandBase.CreateExecutor()
�� Microsoft.EntityFrameworkCore.Tools.Commands.DbContextScaffoldCommand.Execute()
�� Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
�� Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)

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你没看错，中间出现好多乱码。这什么情况 ？

问题出在哪里 ？