C#解压GZ文件

public void ungzip(string path, string decomPath, bool overwrite)
{
//for overwriting purposes
if (File.Exists(decomPath))
{
if (overwrite)
{
File.Delete(decomPath);
}
else
{
throw new IOException("The decompressed path you specified already exists and cannot be overwritten.");
}
}
//create our file streams
GZipStream stream = new GZipStream(new FileStream(path, FileMode.Open, FileAccess.ReadWrite), CompressionMode.Decompress);
FileStream decompressedFile = new FileStream(decomPath, FileMode.OpenOrCreate, FileAccess.Write);
//data represents a byte from the compressed file
//it's set through each iteration of the while loop
int data;
while ((data = stream.ReadByte()) != -1) //iterates over the data of the compressed file and writes the decompressed data
{
decompressedFile.WriteByte((byte)data);
}
//close our file streams
decompressedFile.Close();
stream.Close();
}