How to change Binaryformat of fingerprint from Database to Image format

[ram123]

hi all,
I wanna convert Fingerprint Binaryformat(Image 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(connstring);
con.Open();
SqlCommand cmd2 = new SqlCommand("select FingerPrintImage from TxnFinger where FamilyID=" + filename + " ", con);
SqlDataReader re2 = cmd2.ExecuteReader();
while (re2.Read())
{
buffer1 = (byte[])re2.GetValue(0);
}
con.Close();
byte[] buffer = buffer1.ToArray();

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

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



Thanks in Advance!!