how to compress and decompress any type of file(In C# Windows)

public static void Compress(string strPath)
        {
            DateTime current;
            string dstFile = "";// "C:\\temp\\compressed-file.gzip";
            FileStream fsIn = null;
            FileStream fsOut = null;
            GZipStream gzip = null;
            byte[] buffer;
            int count = 0;
            try
            {
                current = DateTime.Now;
                dstFile = Application.StartupPath + "\\" + "Request" + current.Day.ToString() + current.Month.ToString() + current.Year.ToString() + current.Hour.ToString() + current.Minute.ToString() + current.Second.ToString() + ".zip"; // may use own extension

                fsOut = new FileStream(dstFile, FileMode.Create, FileAccess.Write, FileShare.None);
                gzip = new GZipStream(fsOut, CompressionMode.Compress, true);
                fsIn = new FileStream(strPath, FileMode.Open, FileAccess.Read, FileShare.Read);
                buffer = new byte[fsIn.Length];
                count = fsIn.Read(buffer, 0, buffer.Length);
                fsIn.Close();
                fsIn = null;

                // compress to the destination file
                gzip.Write(buffer, 0, buffer.Length);
            }
            catch (Exception ex)
            {
                // handle or display the error
                System.Diagnostics.Debug.Assert(false, ex.ToString());
            }
            finally
            {
                if (gzip != null)
                {
                    gzip.Close();
                    gzip = null;
                }
                if (fsOut != null)
                {
                    fsOut.Close();
                    fsOut = null;
                }
                if (fsIn != null)
                {
                    fsIn.Close();
                    fsIn = null;
                }
            }
        }