dotnet: consistently use the read.From() name and bump version to 0…

….2.1

wrappers/dotnet/ZXingCpp.DemoReader/Program.cs

@@ -19,7 +19,7 @@ public static List<Barcode> Read(MagickImage img, ReaderOptions? opts = null)
 		return BarcodeReader.Read(iv, opts);
 	}
 
-	public static List<Barcode> Read(this BarcodeReader reader, MagickImage img) => Read(img, reader);
+	public static List<Barcode> From(this BarcodeReader reader, MagickImage img) => Read(img, reader);
 }
 
 public static class SkBitmapBarcodeReader
@@ -44,7 +44,7 @@ public static List<Barcode> Read(SKBitmap img, ReaderOptions? opts = null)
 		return BarcodeReader.Read(iv, opts);
 	}
 
-	public static List<Barcode> Read(this BarcodeReader reader, SKBitmap img) => Read(img, reader);
+	public static List<Barcode> From(this BarcodeReader reader, SKBitmap img) => Read(img, reader);
 }
 
 public class Program
@@ -58,15 +58,15 @@ public static void Main(string[] args)
 #endif
 		Console.WriteLine(img);
 
-		var reader = new BarcodeReader() {
+		var readBarcodes = new BarcodeReader() {
 			TryInvert = false,
 			ReturnErrors = true,
 		};
 
 		if (args.Length >= 2)
-			reader.Formats = Barcode.FormatsFromString(args[1]);
+			readBarcodes.Formats = Barcode.FormatsFromString(args[1]);
 
-		foreach (var b in reader.Read(img))
+		foreach (var b in readBarcodes.From(img))
 			Console.WriteLine($"{b.Format} ({b.ContentType}): {b.Text} / [{string.Join(", ", b.Bytes)}] {b.ErrorMsg}");
 	}
 }

wrappers/dotnet/ZXingCpp/README.md

@@ -20,13 +20,13 @@ public class Program
         var img = SKBitmap.Decode(args[0]).Copy(SKColorType.Gray8);
         var iv = new ImageView(img.GetPixels(), img.Info.Width, img.Info.Height, ImageFormat.Lum);
 
-        var reader = new BarcodeReader() {
+        var readBarcodes = new BarcodeReader() {
             Formats = args.Length > 1 ? Barcode.FormatsFromString(args[1]) : BarcodeFormats.Any,
             TryInvert = false,
             // see the ReaderOptions implementation for more available options
         };
 
-        foreach (var b in reader.Read(iv))
+        foreach (var b in readBarcodes.From(iv))
             Console.WriteLine($"{b.Format} : {b.Text}");
     }
 }
@@ -37,6 +37,9 @@ Executing this sample code from the command line would look like this:
 dotnet run -- <image-file-name> [barcode-format-list]
 ```
 
+See also the [ZXingCpp.DemoReader](https://github.com/zxing-cpp/zxing-cpp/blob/master/wrappers/dotnet/ZXingCpp.DemoReader/Program.cs)
+which shows the use of extension classes to support SkiaSharp and ImageMagick based input.
+
 The NuGet package includes the runtime/native c++ libraries for the x64 architecture on
 Windows, Linux and macOS. If something is not working out of the box or you need arm64 support
 then you need to build the `[lib]ZXing[.dll|.so|.dylib]` file yourself and make sure the .NET
@@ -63,9 +66,12 @@ public class Program
 
 Executing this sample code from the command line would look like this:
 ```sh
-dotnet run -- <barcode-format> <text> <out-file-name>
+dotnet run -- <barcode-format> <text> <out-svg-file-name>
 ```
 
+For an example how to write a PNG file instead of a SVG file, have a look at the
+[ZXingCpp.DemoWriter](https://github.com/zxing-cpp/zxing-cpp/blob/master/wrappers/dotnet/ZXingCpp.DemoWriter/Program.cs).
+
 ## Why ZXingCpp?
 
 There are a number of areas where ZXingCpp shines compared to other popular .NET barcode scanner libraries.

wrappers/dotnet/ZXingCpp/ZXingCpp.csproj

@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
 
     <PackageId>ZXingCpp</PackageId>
-    <Version>0.1.3-alpha</Version>
+    <Version>0.2.1-alpha</Version>
     <Authors>Axel Waggershauser</Authors>
     <Company>zxing-cpp</Company>
     <Description>