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class OneAtATimePlease
{
private static object lok = new object();
static void Main()
{
Dictionary<int, string> d = new Dictionary<int, string>();
Thread t = new Thread(new ParameterizedThreadStart(Fill));
Thread t2 = new Thread(new ParameterizedThreadStart(Fill));
t.Start(d);
t2.Start(d);
t.Join();
t2.Join();
foreach (var i in d)
{
Console.WriteLine(i.Key + " " + i.Value);
}
}
public static void Fill(object lo)
{
Dictionary<int, string> d = (Dictionary<int, string>)lo;
for (int i = 0; i < 10; i++)
{
Random r = new Random(i*4);
int v = r.Next(0, 10);
if (!d.ContainsKey(v))
{
lock (lok)
{
d.Add(v, "Hello from thread: " + Thread.CurrentThread.ManagedThreadId);
}
}
}
}
}