995158-1: Added performance metrics sample code.

Author: sameerkhan001

Performance Metrics/.NET/Apply-watermark/Apply-watermark.slnx

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+<Solution>
+  <Project Path="Apply-watermark/Apply-watermark.csproj" />
+</Solution>

Performance Metrics/.NET/Apply-watermark/Apply-watermark/Apply-watermark.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>Apply_watermark</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="31.2.12" />
+  </ItemGroup>
+
+</Project>

… Metrics/Input/JavaScript_Succinctly.pdf …watermark/Data/JavaScript_Succinctly.pdfPerformance Metrics/Input/JavaScript_Succinctly.pdf renamed to Performance Metrics/.NET/Apply-watermark/Apply-watermark/Data/JavaScript_Succinctly.pdf Performance Metrics/Input/JavaScript_Succinctly.pdf renamed to Performance Metrics/.NET/Apply-watermark/Apply-watermark/Data/JavaScript_Succinctly.pdf

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+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Parsing;
+using System.Diagnostics;
+using Syncfusion.Drawing; 
+
+class Program
+{    
+    private static readonly PdfFont WatermarkFont = new PdfStandardFont(PdfFontFamily.Helvetica, 60, PdfFontStyle.Bold);
+    private static readonly PdfBrush WatermarkBrush = new PdfSolidBrush(Color.Gray);
+    private const string WatermarkText = "CONFIDENTIAL";
+
+    static void Main()
+    {       
+        Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");
+        string inputFolder = Path.GetFullPath("../../../Data/");
+        string outputFolder = Path.GetFullPath("../../../Output/");
+        Directory.CreateDirectory(outputFolder);
+        string[] files = Directory.GetFiles(inputFolder, "*.pdf");
+        foreach (string inputPath in files)
+        {
+            string fileName = Path.GetFileName(inputPath);
+            string outputPath = Path.Combine(outputFolder, fileName);
+            Stopwatch stopwatch = Stopwatch.StartNew();
+            try
+            {
+                PdfLoadedDocument document = new PdfLoadedDocument(inputPath);
+                // Apply watermark to all pages
+                foreach (PdfPageBase page in document.Pages)
+                {
+                    AddWatermark(page.Graphics, page.Size);
+                }
+                document.Save(outputPath);
+                stopwatch.Stop();
+                Console.WriteLine($"{fileName} Apply watermark processed in {stopwatch.Elapsed.TotalSeconds:F2} seconds");
+                document.Close(true);
+            }
+            catch (Exception ex)
+            {
+                stopwatch.Stop();
+                Console.WriteLine($" Error processing {fileName}: {ex.Message}");
+            }
+        }
+    }
+    static void AddWatermark(PdfGraphics graphics, SizeF pageSize)
+    {
+        PdfGraphicsState state = graphics.Save();
+        graphics.SetTransparency(0.3f);
+
+        SizeF textSize = WatermarkFont.MeasureString(WatermarkText);
+
+        graphics.TranslateTransform(pageSize.Width / 2, pageSize.Height / 2);
+        graphics.RotateTransform(-45);
+        graphics.TranslateTransform(-textSize.Width / 2, -textSize.Height / 2);
+
+        graphics.DrawString(WatermarkText, WatermarkFont, WatermarkBrush, 0, 0);
+        graphics.Restore(state);
+    }
+}

…ormance Metrics/Input/PDF_Succinctly.pdf …/Apply-watermark/Data/PDF_Succinctly.pdfPerformance Metrics/Input/PDF_Succinctly.pdf renamed to Performance Metrics/.NET/Apply-watermark/Apply-watermark/Data/PDF_Succinctly.pdf Performance Metrics/Input/PDF_Succinctly.pdf renamed to Performance Metrics/.NET/Apply-watermark/Apply-watermark/Data/PDF_Succinctly.pdf

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+<Solution>
+  <Project Path="Compress-pdf/Compress-pdf.csproj" />
+</Solution>

Performance Metrics/.NET/Apply-watermark/Apply-watermark/Output/gitkeep.txt

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>Compress_pdf</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Imaging.Net.Core" Version="31.2.12" />
+  </ItemGroup>
+
+</Project>