Transformation invisible text using C# and .NET

Complete code

using System.IO;
using SautinSoft.Document;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            // Get your free trial key here:   
            // https://sautinsoft.com/start-for-free/

            TransformationInvisibleText();     
        }
        /// <summary>
        /// Transformation Invisible Text (PDF to PDF/DOCX, DOCX to PDF/DOCX).
        /// </summary>
		/// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/transformation_invisible_text.php
        /// </remarks>
        static void TransformationInvisibleText()
        {
            string loadPath = @"..\..\..\invisible_text.pdf";
            string savePathPDF = @"..\..\..\visible_text.pdf";
            string savePathDocx = @"..\..\..\visible_text.docx";

            //DocumentCore.Serial = "put your serial here";
            DocumentCore pdf = DocumentCore.Load(loadPath, new PdfLoadOptions()
            {
                 PreserveImages = false,
                 ShowInvisibleText = true,
                 PreserveEmbeddedFonts = true
            });

            CharacterFormat singleCharFormat = new CharacterFormat()
            {            
                FontColor = Color.Black
            };

            pdf.DefaultCharacterFormat = singleCharFormat.Clone();

            foreach (Element element in pdf.GetChildElements(true, ElementType.Run, ElementType.Paragraph))
            {
                if (element is Run)
                   (element as Run).CharacterFormat = singleCharFormat.Clone();
                else if (element is Paragraph)
                    (element as Paragraph).CharacterFormatForParagraphMark = singleCharFormat.Clone();
            }
            pdf.Save(savePathPDF);
            pdf.Save(savePathDocx);
        }
        }
    }

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Imports System.IO
Imports SautinSoft.Document

Namespace Example
	Friend Class Program
		Shared Sub Main(ByVal args() As String)
			' Get your free trial key here:   
			' https://sautinsoft.com/start-for-free/

			TransformationInvisibleText()
		End Sub
		''' <summary>
		''' Transformation Invisible Text (PDF to PDF/DOCX, DOCX to PDF/DOCX).
		''' </summary>
		''' <remarks>
		''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/transformation_invisible_text.php
		''' </remarks>
		Private Shared Sub TransformationInvisibleText()
			Dim loadPath As String = "..\..\..\invisible_text.pdf"
			Dim savePathPDF As String = "..\..\..\visible_text.pdf"
			Dim savePathDocx As String = "..\..\..\visible_text.docx"

			'DocumentCore.Serial = "put your serial here";
			Dim pdf As DocumentCore = DocumentCore.Load(loadPath, New PdfLoadOptions() With {
				.PreserveImages = False,
				.ShowInvisibleText = True,
				.PreserveEmbeddedFonts = True
			})

			Dim singleCharFormat As New CharacterFormat() With {.FontColor = Color.Black}

			pdf.DefaultCharacterFormat = singleCharFormat.Clone()

			For Each element As Element In pdf.GetChildElements(True, ElementType.Run, ElementType.Paragraph)
				If TypeOf element Is Run Then
				   TryCast(element, Run).CharacterFormat = singleCharFormat.Clone()
				ElseIf TypeOf element Is Paragraph Then
					TryCast(element, Paragraph).CharacterFormatForParagraphMark = singleCharFormat.Clone()
				End If
			Next element
			pdf.Save(savePathPDF)
			pdf.Save(savePathDocx)
		End Sub
	End Class
End Namespace

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