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I had thought that Convert.ToBase64String() was the method to use to create a base64 string of a byte array, but I recently came across BitConverter.ToString() . What is the difference between the two? And more specifically when should one be used over the other? For example in this question about creating a MD5 digest, a comment by CraigS on an answer states "ToBase64String doesn't return what I want. However, BitConverter.ToString around the byte array does the trick." BitConverter.ToString( MD5.Create().ComputeHash(Encoding.Default.GetBytes(StringToEncode)) ).Replace("-", "") vs Convert.ToBase64String( MD5.Create().ComputeHash(Encoding.Default.GetBytes(StringToEncode)) ) Also, what should be used to encode images to base64? public string ImageToBase64(int Img_ID) { byte[] tempBytes = showImageById(Img_ID); // get image from DB return Convert.ToBase64String(tempBytes); } vs public string ImageToBase64(int Img_ID) { byte[] tempBytes = showImageById(Img_ID); // get image from DB return BitConverter.ToString(tempBytes).Replace("-", ""); }

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