Step 1 is converting from your base64 string to a byte array:
byte[] bytes = Convert.FromBase64String(base64BinaryStr);
Step 2 is saving the byte array to disk:
System.IO.FileStream stream =
new FileStream(@"C:file.pdf", FileMode.CreateNew);
System.IO.BinaryWriter writer =
new BinaryWriter(stream);
writer.Write(bytes, 0, bytes.Length);
writer.Close();
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…