try this:
public void Base64ToImage(string base64String, string fileName)
{
byte[] imageBytes = Convert.FromBase64String(base64String);
using (MemoryStream ms = new MemoryStream())
{
ms.Write(imageBytes, 0, imageBytes.Length);
using (FileStream fileStream = File.OpenWrite(fileName))
{
ms.WriteTo(fileStream);
fileStream.Flush();
fileStream.Close();
}
ms.Close();
}
}
read more about
FromBase64String [
^]method.