How to change Binaryformat of fingerprint from Database to Image format

[ram123]

hi all,
I wanna convert Fingerprint Binaryformat(Im age only not Template) to Image(.png/.jpeg) format....i tried with all possible methods..but it doesn't work...here am posted the code for sample..can anyone Fix this Issue?

SqlConnection con = new SqlConnection(c onnstring);
con.Open();
SqlCommand cmd2 = new SqlCommand("sel ect FingerPrintImag e from TxnFinger where FamilyID=" + filename + " ", con);
SqlDataReader re2 = cmd2.ExecuteRea der();
while (re2.Read())
{
buffer1 = (byte[])re2.GetValue(0 );
}
con.Close();
byte[] buffer = buffer1.ToArray ();

string path = Environment.Cur rentDirectory + "\\capture\ \" + filename1 + ".png";

FileStream fs = new FileStream(path , FileMode.Create );
fs.Write(buffer , 0, buffer.Length);
fs.Close();



Thanks in Advance!!