自动生成的代码会报错，在app.config加上@H_404_1@

  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.sqlite" />
      <add name="sqlite Data Provider" invariant="System.Data.sqlite" description=".Net Framework Data Provider for sqlite" type="System.Data.sqlite.sqliteFactory,System.Data.sqlite,Version=1.0.92.0,Culture=neutral,PublicKeyToken=db937bc2d44ff139" />
      <remove invariant="System.Data.sqlite.EF6" />
      <add name="sqlite Data Provider (Entity Framework 6)" invariant="System.Data.sqlite.EF6" description=".Net Framework Data Provider for sqlite (Entity Framework 6)" type="System.Data.sqlite.EF6.sqliteProviderFactory,System.Data.sqlite.EF6,PublicKeyToken=db937bc2d44ff139" />
    </DbProviderFactories>
  </system.data>