Thread safe StreamWriter C# how to do it? 1

Question

What is the best way to build a program that is thread safe in terms that it needs to write double values to a file. If the function that saves the values via streamwriter is being called by multiple threads? Whats the best way of doing it?

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Code from comment:

    static void Main()
    {
        List<double> Values = new List<double>();
        StreamWriter writer = new StreamWriter("test.out");

        for (int i = 0; i < 1000; i++) Values.Add(i);

        foreach (double V in Values)
        {
            ThreadPool.QueueUserWorkItem(delegate(object state) { SaveValues(writer, V); }, V);
        }
    }

    static void SaveValues(StreamWriter writer, double Value)
    {
        lock (writer) writer.WriteLine(Value);
    } 

Answer 1

TextWriter.Synchronized

Creates a thread-safe wrapper around the specified TextWriter. ll writes to the returned wrapper will be thread safe.