Tutorial Three: Cannot do first migration with EF Core migration tool

[jcjiang]

Describe the bug In Tutorial Three: Add a Database, I run into an error when I run dotnet ef migrations add InitialCreate.

To Reproduce Steps to reproduce the behavior:

1. dotnet add package Microsoft.EntityFrameworkCore.Sqlite --version 6.0.0-preview.6.21352.1
2. dotnet tool install --global dotnet-ef
3. dotnet add package Microsoft.EntityFrameworkCore.Design --version 6.0.0-preview.6.21352.1
4. Set connection string
5. Add context to services
6. Run dotnet ef migrations add InitialCreate
7. See logs

Expected behavior I expect the migration to complete successfully

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