Add example with transaction security with save points.

EntityFrameworkCore.Console/Program.cs

@@ -23,6 +23,56 @@ context.Database.EnsureCreated();
 // var firstCoach = await context.Coaches.FirstOrDefaultAsync();
 
 
+async Task TransactionWithSavepoint()
+{
+  var transaction = context.Database.BeginTransaction();
+
+  var league = new League
+  {
+    Name = "Geosphere league"
+  };
+
+  context.Add(league);
+  context.SaveChanges();
+
+  transaction.CreateSavepoint("CreatedLeague");
+
+  var coach = new Coach
+  {
+    Name = "Brad Ironfist"
+  };
+
+  context.Add(coach);
+  context.SaveChanges();
+
+  var teams = new List<Team>
+  {
+    new Team
+    {
+      Name = "Dominators",
+      LeagueId = league.Id,
+      CoachId = coach.Id
+    }
+  };
+
+  context.AddRange(teams);
+  context.SaveChanges();
+
+  try
+  {
+    transaction.Commit();
+  }
+  catch (Exception)
+  {
+    // Rollback everything.
+    //transaction.Rollback();
+
+    // Or rollback to a specific save point.
+    transaction.RollbackToSavepoint("CreatedLeague");
+    throw;
+  }
+}
+
 async Task UserDefinedQuery()
 {
   var earliestMatch = context.GetEarliestTeamMatch(1);