C#中使用DeflateStream压缩数据文件的代码

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String sourcefilename = FILETOBECOMPRESSED;
Filestream sourcefile = File.OpenRead(sourcefilename);
Filestream destinationfile = File.Create(outputfilename);
DeflateStream compressionstream = new DeflateStream(destinationfile, CompressionMode.Compress);
int sourcebyte = sourcefile.ReadByte();
while(sourcebyte != -1)
{
	compressionstream.WriteByte((byte)sourcebyte);
	sourcebyte = sourcefile.ReadByte();
}