Refactor QRCodeHelper

v2rayN/ServiceLib/Common/QRCodeHelper.cs

@@ -0,0 +1,15 @@
+using QRCoder;
+
+namespace ServiceLib.Common
+{
+    public class QRCodeHelper
+    {
+        public static byte[]? GenQRCode(string? url)
+        {
+            using QRCodeGenerator qrGenerator = new();
+            using QRCodeData qrCodeData = qrGenerator.CreateQrCode(url ?? string.Empty, QRCodeGenerator.ECCLevel.Q);
+            using PngByteQRCode qrCode = new(qrCodeData);
+            return qrCode.GetGraphic(20);
+        }
+    }
+}