Copy from one file to another file : File Util « File Stream « C# / C Sharp

Copy from one file to another file

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using System;
using System.IO;
namespace Utilities
    static class StreamUtilities {
        public static void CopyFromFile(string fromFilePath, Stream toStream)
            using (Stream fromStream = File.OpenRead(fromFilePath))
                CopyStream(fromStream, toStream);

        public static void CopyToFile(Stream fromStream, string toFilePath)
            using (Stream toStream = File.Create(toFilePath))
                CopyStream(fromStream, toStream);

        /// <summary>
        /// CopyStream simply copies 'fromStream' to 'toStream'
        /// </summary>
        public static int CopyStream(Stream fromStream, Stream toStream)
            byte[] buffer = new byte[8192];
            int totalBytes = 0;
            for (; ; )
                int count = fromStream.Read(buffer, 0, buffer.Length);
                if (count == 0)
                toStream.Write(buffer, 0, count);
                totalBytes += count;
            return totalBytes;


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