Added the OCR sample

OCR/.NET/Get-image-rotation-angle-from-OCR/Get-image-rotation-angle-from-OCR.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}") = "Get-image-rotation-angle-from-OCR", "Get-image-rotation-angle-from-OCR\Get-image-rotation-angle-from-OCR.csproj", "{166945E9-DA34-4693-B891-BC5BA23BD990}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{166945E9-DA34-4693-B891-BC5BA23BD990}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{166945E9-DA34-4693-B891-BC5BA23BD990}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{166945E9-DA34-4693-B891-BC5BA23BD990}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{166945E9-DA34-4693-B891-BC5BA23BD990}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {512C0288-3F23-4E95-A770-4A809BC41D5E}
+	EndGlobalSection
+EndGlobal

OCR/.NET/Get-image-rotation-angle-from-OCR/Get-image-rotation-angle-from-OCR/Get-image-rotation-angle-from-OCR.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>Get_image_rotation_angle_from_OCR</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.PDF.OCR.NET" Version="23.1.38" />
+  </ItemGroup>
+
+</Project>

OCR/.NET/Get-image-rotation-angle-from-OCR/Get-image-rotation-angle-from-OCR/Program.cs

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+// See https://aka.ms/new-console-template for more information
+
+using Syncfusion.OCRProcessor;
+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Parsing;
+using System.Reflection.Metadata;
+
+//Initialize the OCR processor.
+using (OCRProcessor processor = new OCRProcessor())
+{
+    //Get the stream from an image file. 
+    FileStream stream = new FileStream(@"../../../Input.pdf", FileMode.Open);
+    //Set the OCR language to process.
+    PdfLoadedDocument document = new PdfLoadedDocument(stream);
+    //Set the OCR language.
+    processor.Settings.Language = Languages.English;
+    //Set the Unicode font to preserve the Unicode characters in a PDF document.
+    processor.TesseractPath = @"../../../TesseractBinaries/";
+    processor.Settings.PageSegment = PageSegMode.AutoOsd;
+    processor.PerformOCR(document, 0, 0, @"../../../Tessdata", out OCRLayoutResult result);
+    float angle = 0;
+    if (result != null)
+    {
+        foreach (var page in result.Pages)
+        {
+            angle = page.ImageRotation;
+            if (angle == 180)
+            { document.Pages[0].Rotation = PdfPageRotateAngle.RotateAngle90; }
+            if (angle == 90)
+            { document.Pages[0].Rotation = PdfPageRotateAngle.RotateAngle270; }
+        }
+    }
+
+    //Create file stream.
+    using (FileStream outputFileStream = new FileStream("../../../Output.pdf", FileMode.Create, FileAccess.ReadWrite))
+    {
+        //Save the PDF document to file stream.
+        document.Save(outputFileStream);
+    }
+}