static async Task Main(string[] args)
{
SampleDataContext db = new SampleDataContext();
JointAccount j = db.JointAccounts.Where(x => x.id == 1).Single();
try
{
// User 1 tries to deposit 500 to the account
await deposit(500, j, db);
// user 2 tries to withdraw 200 at the same time when user 1 is depositng
db.ExecuteCommand("Update JointAccount set balance = balance - 200 where id=1");
// change conflict exception occurs
db.SubmitChanges();
}
catch (Exception e)
{
db.ChangeConflicts.ResolveAll(RefreshMode.KeepCurrentValues); // preference will only be given to user 1 actions
db.SubmitChanges();
}
Console.WriteLine(j.balance);
}
public static async Task deposit(int amount, JointAccount j, SampleDataContext db)
{
j.balance += amount;
await Task.Delay(2000);
}