C# snippet for connecting to an Azure DB instance via access token in a .NET Core app

appsettings.json

{
  "DefaultConnection": "Server=tcp:mydbserver.database.windows.net,1433;Database=mydb;"
}

MyDbContext.cs

using Microsoft.Azure.Services.AppAuthentication;
using System.Data.SqlClient;

namespace MyApp.Infrastructure.EntityFramework
{
    public class MyDbContext : DbContext
    {
      public MyDbContext()
      {
          var conn = (SqlConnection)this.Database.GetDbConnection();
          conn.AccessToken = (new AzureServiceTokenProvider()).GetAccessTokenAsync("https://database.windows.net/").Result;
      }
    }
}

Steps:

1. Target .NET 2.2 (minimum)
2. Install NuGet Package Microsoft.Azure.Services.AppAuthentication
3. Change connection string
4. Add the code snippet to the constructor of your DbContext class