EF Core Environment Selection - asp.net-core

Question

We have recently started writing applications in .net core using EF Core in a code first model. Previously we would change the connection string in the web.config to point to the database that we wanted to update and then run Update-Database -Verbose, which worked well.
Now to select the environment so that the correct connection string is used we have to run $env:ASPNETCORE_ENVIRONMENT = "Development" and then run Update-Database -Verbose. This is where my problem comes in, I can run the command to set the environment to development, but it will still point to my test environment, I can then rerun the exact commands again and it will then point to my development environment.
Is this a known issue, or am I interacting with EF Core incorrectly? I don't want to get to the point that we have this app in production and accidentally updating the production db when attempting to update my dev db.

Answer 1

In an ASP .NET Core web app you could set up ConfigureServices in Startup.cs like so to connect to the appropriate DB depending on the current environment:
public void ConfigureServices(IServiceCollection services)
{
if (_env.IsDevelopment())
{
services.AddDbContext<MyDbContext>(options =>
options.UseThisDb(MyDevDbConnectionString)
);
}
else
{
// For production.
services.AddDbContext<MyDbContext>(options =>
options.UseThisDb(MyProdDbConnectionString)
);
}