static void Main(string[] args) {
// create the bank account instance
BankAccount account = new BankAccount();
// create an array of tasks
Task<int>[] tasks = new Task<int>[10];
for (int i = 0; i < 10; i++) {
// create a new task
tasks[i] = new Task<int>((stateObject) => {
// get the state object
int isolatedBalance = (int)stateObject;
// enter a loop for 1000 balance updates
for (int j = 0; j < 1000; j++) {
// update the balance
isolatedBalance++;
}
// return the updated balance
return isolatedBalance;
}, account.Balance);
// start the new task
tasks[i].Start();
}
// get the result from each task and add it to
// the balance
for (int i = 0; i < 10; i++) {
account.Balance += tasks[i].Result;
}
// write out the counter value
Console.WriteLine("Expected value {0}, Balance: {1}",
10000, account.Balance);
// wait for input before exiting
Console.WriteLine("Press enter to finish");
Console.ReadLine();
}
static void Main(string[] args)
{
Task<BankAccount> rootTask = new Task<BankAccount>(() => {
// create a new bank account
BankAccount account = new BankAccount();
// enter a loop
for (int i = 0; i < 1000; i++) {
// increment the account total
account.Balance++;
}
// return the bank account
return account;
});
// create the second generation task, which will double the antecdent balance
Task<int> continuationTask1
= rootTask.ContinueWith<int>((Task<BankAccount> antecedent) => {
Console.WriteLine("Interim Balance 1: {0}", antecedent.Result.Balance);
return antecedent.Result.Balance * 2;
});
// create a third generation task, which will print out the result
Task continuationTask2
= continuationTask1.ContinueWith((Task<int> antecedent) => {
Console.WriteLine("Final Balance 1: {0}", antecedent.Result);
});
// create a second and third generation task in one step
rootTask.ContinueWith<int>((Task<BankAccount> antecedent) => {
Console.WriteLine("Interim Balance 2: {0}", antecedent.Result.Balance);
return antecedent.Result.Balance / 2;
}).ContinueWith((Task<int> antecedent) => {
Console.WriteLine("Final Balance 2: {0}", antecedent.Result);
});
// start the task
rootTask.Start();
// wait for input before exiting
Console.WriteLine("Press enter to finish");
Console.ReadLine();
}
