Added the Find Text sample

Text/Find-text-in-PDF-document/.NET/Find-text-in-PDF-document.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32819.101
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Find-text-in-PDF-document", "Find-text-in-PDF-document\Find-text-in-PDF-document.csproj", "{A3B398F4-E8B9-4522-943B-12037BE3A417}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A3B398F4-E8B9-4522-943B-12037BE3A417}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A3B398F4-E8B9-4522-943B-12037BE3A417}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A3B398F4-E8B9-4522-943B-12037BE3A417}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A3B398F4-E8B9-4522-943B-12037BE3A417}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {C22A03D0-BE02-4878-B421-6975254E28C6}
+	EndGlobalSection
+EndGlobal

Text/Find-text-in-PDF-document/.NET/Find-text-in-PDF-document/Find-text-in-PDF-document.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>Find_text_in_PDF_document</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.NET" Version="22.2.11" />
+  </ItemGroup>
+
+</Project>

Text/Find-text-in-PDF-document/.NET/Find-text-in-PDF-document/Program.cs

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+// See https://aka.ms/new-console-template for more information
+
+using Syncfusion.Pdf.Parsing;
+using static System.Net.Mime.MediaTypeNames;
+
+string matchText = string.Empty;
+//Load an existing PDF document. 
+FileStream docStream = new FileStream("../../../Input.pdf", FileMode.Open, FileAccess.Read);
+PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
+
+//Returns page number and rectangle positions of the text maches. 
+Dictionary<int, List<Syncfusion.Drawing.RectangleF>> matchRects = new Dictionary<int, List<Syncfusion.Drawing.RectangleF>>();
+loadedDocument.FindText("document", out matchRects);
+
+for (int i = 0; i < loadedDocument.Pages.Count; i++)
+{
+    List<Syncfusion.Drawing.RectangleF> rectCoords = matchRects[i];
+    matchText = "First Occurrence: X:" + rectCoords[0].X + "; Y:" + rectCoords[0].Y + "; Width:" + rectCoords[0].Width + "; Height:" + rectCoords[0].Height + Environment.NewLine +
+                      "Second Occurrence: X:" + rectCoords[1].X + "; Y:" + rectCoords[1].Y + "; Width:" + rectCoords[1].Width + "; Height:" + rectCoords[1].Height + Environment.NewLine +
+                      "Third Occurrence: X:" + rectCoords[2].X + "; Y:" + rectCoords[2].Y + "; Width:" + rectCoords[2].Width + "; Height:" + rectCoords[2].Height + Environment.NewLine +
+                      "Fourth Occurrence: X:" + rectCoords[3].X + "; Y:" + rectCoords[3].Y + "; Width:" + rectCoords[3].Width + "; Height:" + rectCoords[3].Height + Environment.NewLine;
+}
+
+//Close the document.
+loadedDocument.Close(true);
+
+Console.WriteLine(matchText);
+Console.ReadLine();