[C#]Stream.Write Extension Method

public static class StreamExtension { public static void Write(this Stream targetStream, byte[] buffer) { if (!targetStream.CanWrite) throw new ArgumentException(“targetStream”, “Unwritable stream”);

    targetStream.Write(buffer, 0, buffer.Length);
}

public static void Write(this Stream targetStream, Stream sourceStream)
{
    if (!targetStream.CanWrite)
        throw new ArgumentException("targetStream", "Unwritable stream");

    if (sourceStream == null)
        throw new ArgumentNullException("sourceStream");

    if (!sourceStream.CanRead)
        throw new ArgumentException("sourceStream", "Unreadable stream");

    targetStream.Write(sourceStream, 1024, null);
}

public static void Write(this Stream targetStream, Stream sourceStream, int bufferSize, Action<object, System.ComponentModel.ProgressChangedEventArgs> progressChangedCallBack)
{
    if (sourceStream == null)
        throw new ArgumentNullException("sourceStream");

    if (!sourceStream.CanRead)
        throw new ArgumentException("sourceStream", "Unreadable stream");

    if (!targetStream.CanWrite)
        throw new ArgumentException("targetStream", "Unwritable stream");

    if (bufferSize < 1024)
        throw new ArgumentOutOfRangeException("bufferSize", "Must bigger than 1024");

    byte[] buffer = new byte[bufferSize];

    int offset = 0;
    int readByteCount = 0;
    int percent = 0;

    while ((readByteCount = sourceStream.Read(buffer, 0, bufferSize)) > 0)
    {
        targetStream.Write(buffer, 0, readByteCount);

        if (progressChangedCallBack != null)
        {
            offset += readByteCount;

            var currentPercent = (int)(((double)offset) / sourceStream.Length * 100);
            if (currentPercent == percent)
                continue;

            percent = currentPercent;
            progressChangedCallBack(targetStream, new System.ComponentModel.ProgressChangedEventArgs(percent, null));
        }
    }
}

}

namespace ConsoleApplication11 { class Program { static void Main(string[] args) {
using (FileStream targetStream = File .Create (@“c: est_copy.dat”)) { using (FileStream sourceStream= File.Open (@“c: est.dat”, FileMode.Open)) { targetStream.Write(sourceStream, 1024, (sender, e) => { Console.WriteLine(e.ProgressPercentage.ToString()); }); } } } } }

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