Added sample for Convert PDF pages to single Image in NET core Application

PDF-to-image/Convert-PDF-Pages-to-Single-Image-.NET/Convert-PDF-Pages-to-Single-Image.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Convert_PDF_to_Image</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.PdfToImageConverter.Net" Version="*" />
+  </ItemGroup>
+
+</Project>

PDF-to-image/Convert-PDF-Pages-to-Single-Image-.NET/Convert-PDF-Pages-to-Single-Image.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34622.214
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Convert-PDF-Pages-to-Single-Image", "Convert-PDF-Pages-to-Single-Image.csproj", "{DD88C92F-A41B-4A24-8106-54E6B93E70B0}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{DD88C92F-A41B-4A24-8106-54E6B93E70B0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DD88C92F-A41B-4A24-8106-54E6B93E70B0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DD88C92F-A41B-4A24-8106-54E6B93E70B0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DD88C92F-A41B-4A24-8106-54E6B93E70B0}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {27AA5CE1-6AA8-4360-B3FB-540F5965D098}
+	EndGlobalSection
+EndGlobal

PDF-to-image/Convert-PDF-Pages-to-Single-Image-.NET/Program.cs

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+using SkiaSharp;
+using Syncfusion.PdfToImageConverter;
+using System;
+using System.IO;
+
+namespace Convert_PDF_to_Image
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            //Initialize PDF to Image converter.
+            PdfToImageConverter imageConverter = new PdfToImageConverter();
+            //Load the PDF document as a stream
+            FileStream inputStream = new FileStream("../../../Input.pdf", FileMode.Open, FileAccess.ReadWrite);
+            imageConverter.Load(inputStream);
+            //Convert PDF to Image.
+            Stream[] imageStreams = imageConverter.Convert(0, imageConverter.PageCount - 1, false, false);
+            CombineImages(imageStreams, "Output.png");
+
+            //Dispose the image streams.
+            foreach (Stream imageStream in imageStreams)
+                imageStream.Dispose();
+        }
+        /// <summary>
+        /// Combines multiple images from streams into a single image.
+        /// </summary>
+        /// <param name="imageStreams">Streams containing the images to be combined.</param>
+        /// <param name="outputPath">Output path where the combined image will be saved.</param>
+        public static void CombineImages(Stream[] imageStreams, string outputPath)
+        {
+            if (imageStreams == null || imageStreams.Length == 0)
+                throw new ArgumentException("No images to combine.");
+
+            // Load all images and get their dimensions
+            SKBitmap[] bitmaps = new SKBitmap[imageStreams.Length];
+            int maxWidth = 0;
+            int totalHeight = 0;
+            int margin = 20;
+
+            for (int i = 0; i < imageStreams.Length; i++)
+            {
+                imageStreams[i].Position = 0;
+                bitmaps[i] = SKBitmap.Decode(imageStreams[i]);
+                maxWidth = Math.Max(maxWidth, bitmaps[i].Width);
+                totalHeight += bitmaps[i].Height + margin;
+            }
+
+            // Add margins to the total width and height
+            int combinedWidth = maxWidth + 2 * margin;
+            // Add margin at the bottom
+            totalHeight += margin;
+
+            // Create a new bitmap with the combined dimensions
+            using (SKBitmap combinedBitmap = new SKBitmap(combinedWidth, totalHeight))
+            {
+                using (SKCanvas canvas = new SKCanvas(combinedBitmap))
+                {
+                    // Set background color to the specified color
+                    canvas.Clear(new SKColor(240, 240, 240));
+
+                    // Draw each bitmap onto the canvas
+                    int yOffset = margin;
+                    for (int i = 0; i < bitmaps.Length; i++)
+                    {
+                        int xOffset = (combinedWidth - bitmaps[i].Width) / 2; // Center the image horizontally
+                        canvas.DrawBitmap(bitmaps[i], new SKPoint(xOffset, yOffset));
+                        yOffset += bitmaps[i].Height + margin; // Add margin between rows
+                    }
+
+                    // Save the combined bitmap to the output stream
+                    using (SKImage image = SKImage.FromBitmap(combinedBitmap))
+                    {
+                        using (SKData data = image.Encode(SKEncodedImageFormat.Png, 100))
+                        {
+                            using (FileStream stream = File.OpenWrite(outputPath))
+                                data.SaveTo(stream);
+                        }
+                    }
+                }
+            }
+        }
+    }
+}