Shane32 · Shane32 · Oct 5, 2025 · Oct 3, 2025 · Oct 5, 2025
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -14,6 +14,7 @@
     <Version>1.6.1</Version>
     <LangVersion>12</LangVersion>
     <IsPackable>false</IsPackable>
+    <ImplicitUsings>enable</ImplicitUsings>
 
     <!-- Set common NuGet package properties -->
     <Authors>Raffael Herrmann, Shane Krueger</Authors>
@@ -47,4 +48,12 @@
     <None Include="$(MSBuildThisFileDirectory)nuget-icon.png" Pack="true" PackagePath="\" />
   </ItemGroup>
 
+  <!-- Configure implicit usings -->
+  <ItemGroup>
+    <Using Include="System.Collections.BitArray" Alias="BitArray" />
+    <Using Include="System.Globalization"/>
+    <Using Include="System.Text" />
+    <Using Include="System.Text.RegularExpressions"/>
+  </ItemGroup>
+
 </Project>
diff --git a/Directory.Build.targets b/Directory.Build.targets
@@ -17,4 +17,9 @@
     <ContinuousIntegrationBuild Condition="'$(Configuration)' == 'Release' AND '$(GITHUB_ACTIONS)' == 'true'">true</ContinuousIntegrationBuild>
   </PropertyGroup>
 
+  <!-- Remove System.Threading.Tasks as implicit using since it does not exist in .NET Framework 3.5 -->
+  <ItemGroup Condition="'$(TargetFramework)' == 'net35'">
+    <Using Remove="System.Threading.Tasks" />
+  </ItemGroup>
+
 </Project>
diff --git a/QRCoder.Xaml/XamlQRCode.cs b/QRCoder.Xaml/XamlQRCode.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Windows;
 using System.Windows.Media;
 using static QRCoder.QRCodeGenerator;

diff --git a/QRCoder/ASCIIQRCode.cs b/QRCoder/ASCIIQRCode.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
 using static QRCoder.QRCodeGenerator;
 
 namespace QRCoder;

diff --git a/QRCoder/ArtQRCode.cs b/QRCoder/ArtQRCode.cs
@@ -1,6 +1,5 @@
 #if SYSTEM_DRAWING
 
-using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using static QRCoder.ArtQRCode;

diff --git a/QRCoder/Base64QRCode.cs b/QRCoder/Base64QRCode.cs
@@ -1,8 +1,6 @@
 #if !NETSTANDARD1_3
-using System;
 using System.Drawing;
 using System.Drawing.Imaging;
-using System.IO;
 using System.Runtime.InteropServices;
 using static QRCoder.Base64QRCode;
 using static QRCoder.QRCodeGenerator;

diff --git a/QRCoder/BitmapByteQRCode.cs b/QRCoder/BitmapByteQRCode.cs
@@ -1,4 +1,3 @@
-using System;
 using static QRCoder.QRCodeGenerator;
 
 namespace QRCoder;

diff --git a/QRCoder/Exceptions/DataTooLongException.cs b/QRCoder/Exceptions/DataTooLongException.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder.Exceptions;
 
 /// <summary>

diff --git a/QRCoder/Extensions/BitArrayExtensions.cs b/QRCoder/Extensions/BitArrayExtensions.cs
@@ -1,5 +1,3 @@
-using System.Collections;
-
 namespace QRCoder;
 
 /// <summary>

diff --git a/QRCoder/Extensions/StringValueAttribute.cs b/QRCoder/Extensions/StringValueAttribute.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 

diff --git a/QRCoder/PayloadGenerator.cs b/QRCoder/PayloadGenerator.cs
@@ -1,8 +1,3 @@
-using System;
-using System.Globalization;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
 #if NETSTANDARD1_3
 using System.Reflection;
 #endif

diff --git a/QRCoder/PayloadGenerator/BezahlCode.cs b/QRCoder/PayloadGenerator/BezahlCode.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Text.RegularExpressions;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/BitcoinLikeCryptoCurrencyAddress.cs b/QRCoder/PayloadGenerator/BitcoinLikeCryptoCurrencyAddress.cs
@@ -1,8 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Globalization;
-using System.Linq;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/CalendarEvent.cs b/QRCoder/PayloadGenerator/CalendarEvent.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/ContactData.cs b/QRCoder/PayloadGenerator/ContactData.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/Girocode.cs b/QRCoder/PayloadGenerator/Girocode.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/MMS.cs b/QRCoder/PayloadGenerator/MMS.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/Mail.cs b/QRCoder/PayloadGenerator/Mail.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/MoneroTransaction.cs b/QRCoder/PayloadGenerator/MoneroTransaction.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/OneTimePassword.cs b/QRCoder/PayloadGenerator/OneTimePassword.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Text;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/RussiaPaymentOrder.cs b/QRCoder/PayloadGenerator/RussiaPaymentOrder.cs
@@ -1,8 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
 #if NETSTANDARD1_3
 using System.Reflection;
 #endif

diff --git a/QRCoder/PayloadGenerator/SMS.cs b/QRCoder/PayloadGenerator/SMS.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/ShadowSocksConfig.cs b/QRCoder/PayloadGenerator/ShadowSocksConfig.cs
@@ -1,8 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/SlovenianUpnQr.cs b/QRCoder/PayloadGenerator/SlovenianUpnQr.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Text;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/SwissQrCode.cs b/QRCoder/PayloadGenerator/SwissQrCode.cs
@@ -1,8 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.RegularExpressions;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/Url.cs b/QRCoder/PayloadGenerator/Url.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PayloadGenerator/WhatsAppMessage.cs b/QRCoder/PayloadGenerator/WhatsAppMessage.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Text.RegularExpressions;
-
 namespace QRCoder;
 
 public static partial class PayloadGenerator

diff --git a/QRCoder/PdfByteQRCode.cs b/QRCoder/PdfByteQRCode.cs
@@ -1,10 +1,5 @@
 #if SYSTEM_DRAWING
-using System;
-using System.Collections.Generic;
 using System.Drawing.Imaging;
-using System.Globalization;
-using System.IO;
-using System.Linq;
 using static QRCoder.QRCodeGenerator;
 
 /* This renderer is inspired by RemusVasii: https://github.com/Shane32/QRCoder/issues/223 */
@@ -88,7 +83,7 @@ public byte[] GetGraphic(int pixelsPerModule, string darkColorHtmlHex, string li
             var jpgImageCodecInfo = ImageCodecInfo.GetImageEncoders().First(x => x.MimeType == "image/jpeg");
             var jpgEncoderParameters = new EncoderParameters(1)
             {
-                Param = new EncoderParameter[] { new EncoderParameter(Encoder.Quality, jpgQuality) }
+                Param = new EncoderParameter[] { new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, jpgQuality) }
             };
             img.Save(msJpeg, jpgImageCodecInfo, jpgEncoderParameters);
             jpgArray = msJpeg.ToArray();

diff --git a/QRCoder/PngByteQRCode.cs b/QRCoder/PngByteQRCode.cs
@@ -1,8 +1,6 @@
 #if HAS_SPAN
 using System.Buffers;
 #endif
-using System;
-using System.IO;
 using System.IO.Compression;
 using static QRCoder.QRCodeGenerator;
 

diff --git a/QRCoder/PostscriptQRCode.cs b/QRCoder/PostscriptQRCode.cs
@@ -1,6 +1,4 @@
-
 #if !NETSTANDARD1_3
-using System;
 using System.Drawing;
 using static QRCoder.QRCodeGenerator;
 

diff --git a/QRCoder/QRCode.cs b/QRCoder/QRCode.cs
@@ -1,5 +1,4 @@
 #if SYSTEM_DRAWING
-using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using static QRCoder.QRCodeGenerator;

diff --git a/QRCoder/QRCodeData.cs b/QRCoder/QRCodeData.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.IO;
 using System.IO.Compression;
 
 namespace QRCoder;

diff --git a/QRCoder/QRCodeGenerator.cs b/QRCoder/QRCodeGenerator.cs
@@ -1,14 +1,8 @@
-using System;
 #if HAS_SPAN
 using System.Buffers;
 #endif
-using System.Collections;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Globalization;
-using System.Linq;
 using System.Runtime.CompilerServices;
-using System.Text;
 
 namespace QRCoder;
 

diff --git a/QRCoder/QRCodeGenerator/AlignmentPattern.cs b/QRCoder/QRCodeGenerator/AlignmentPattern.cs
@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/AlignmentPatterns.cs b/QRCoder/QRCodeGenerator/AlignmentPatterns.cs
@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/AlphanumericEncoder.cs b/QRCoder/QRCodeGenerator/AlphanumericEncoder.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/CapacityTables.cs b/QRCoder/QRCodeGenerator/CapacityTables.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/CodewordBlock.cs b/QRCoder/QRCodeGenerator/CodewordBlock.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-
 #if HAS_SPAN
 using System.Buffers;
 #endif

diff --git a/QRCoder/QRCodeGenerator/GaloisField.cs b/QRCoder/QRCodeGenerator/GaloisField.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Diagnostics;
 
 namespace QRCoder;

diff --git a/QRCoder/QRCodeGenerator/ModulePlacer.BlockedModules.cs b/QRCoder/QRCodeGenerator/ModulePlacer.BlockedModules.cs
@@ -1,7 +1,3 @@
-using System;
-using System.Collections;
-using System.Threading;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/ModulePlacer.MaskPattern.cs b/QRCoder/QRCodeGenerator/ModulePlacer.MaskPattern.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/ModulePlacer.cs b/QRCoder/QRCodeGenerator/ModulePlacer.cs
@@ -1,6 +1,3 @@
-using System.Collections;
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/Point.cs b/QRCoder/QRCodeGenerator/Point.cs
@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using System.Reflection;
 
 namespace QRCoder;

diff --git a/QRCoder/QRCodeGenerator/Polynom.cs b/QRCoder/QRCodeGenerator/Polynom.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Text;
 
 namespace QRCoder;
 

diff --git a/QRCoder/QRCodeGenerator/VersionInfo.cs b/QRCoder/QRCodeGenerator/VersionInfo.cs
@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/QRCodeGenerator/VersionInfoDetails.cs b/QRCoder/QRCodeGenerator/VersionInfoDetails.cs
@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace QRCoder;
 
 public partial class QRCodeGenerator

diff --git a/QRCoder/SvgQRCode.cs b/QRCoder/SvgQRCode.cs
@@ -1,7 +1,5 @@
 #if !NETSTANDARD1_3
-using System;
 using System.Drawing;
-using System.Text;
 using QRCoder.Extensions;
 using static QRCoder.QRCodeGenerator;
 using static QRCoder.SvgQRCode;

diff --git a/QRCoderApiTests/ApiApprovalTests.cs b/QRCoderApiTests/ApiApprovalTests.cs
@@ -1,7 +1,4 @@
-using System;
 using System.Diagnostics;
-using System.IO;
-using System.Linq;
 using System.Reflection;
 using System.Xml.Linq;
 using PublicApiGenerator;

diff --git a/QRCoderConsole/Program.cs b/QRCoderConsole/Program.cs
@@ -1,7 +1,5 @@
-using System;
 using System.Drawing.Imaging;
 using System.IO;
-using System.Text;
 using System.Windows.Markup;
 using NDesk.Options;
 using QRCoder;

diff --git a/QRCoderDemo/Form1.cs b/QRCoderDemo/Form1.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Drawing;
 using System.Drawing.Imaging;
 using System.Windows.Forms;

diff --git a/QRCoderDemo/Program.cs b/QRCoderDemo/Program.cs
@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Windows.Forms;
 
 namespace QRCoderDemo;