Create DbContext file.

EntityFrameworkCore.Data/DeadBallZoneLeagueDbContext.cs

@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore;
+
+using EntityFrameworkCore.Domain;
+
+namespace EntityFrameworkCore.Data;
+
+public class DeadBallZoneLeagueDbContext : DbContext
+{
+  private string DbPath;
+  public DeadBallZoneLeagueDbContext()
+  {
+    var folder = Environment.SpecialFolder.LocalApplicationData;
+    var path = Environment.GetFolderPath(folder);
+    DbPath = Path.Combine(path, "DeadBallZoneLeague_EFCore.db");
+  }
+  public DbSet<Team> Teams { get; set; }
+  public DbSet<Coach> Coaches { get; set; }
+
+  protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+  {
+    optionsBuilder.UseSqlite($"Data source={DbPath}");
+  }
+}