PM> Install-Package Spire.XLS

using Spire.Xls;

namespace ConvertExcelToOpenXML
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Workbook class
            Workbook workbook = new Workbook();
            //Load an Excel file
            workbook.LoadFromFile("Sample.xlsx");

            //Save the Excel file in Open XML file format
            workbook.SaveAsXml("ExcelToXML.xml");
        }
    }
}

Imports Spire.Xls

Namespace ConvertExcelToOpenXML
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Workbook class
            Dim workbook As Workbook = New Workbook()
            'Load an Excel file
            workbook.LoadFromFile("Sample.xlsx")

            'Save the Excel file in Open XML file format
            workbook.SaveAsXml("ExcelToXML.xml")
        End Sub
    End Class
End Namespace

using Spire.Xls;

namespace ConvertOpenXMLToExcel
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Workbook class
            Workbook workbook = new Workbook();
            //Load an Open XML file
            workbook.LoadFromXml("ExcelToXML.xml");

            //Save the Open XML file in Excel XLSX file format
            workbook.SaveToFile("XMLToExcel.xlsx", ExcelVersion.Version2016);
        }
    }
}

Imports Spire.Xls

Namespace ConvertOpenXMLToExcel
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Workbook class
            Dim workbook As Workbook = New Workbook()
            'Load Office Open XML file
            workbook.LoadFromXml("ExcelToXML.xml")

            'Save the Open XML file in Excel XLSX file format
            workbook.SaveToFile("XMLToExcel.xlsx", ExcelVersion.Version2016)
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.XLS

using Spire.Xls;

namespace XLSToHTML

{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Workbook instance
            Workbook workbook = new Workbook();
            
            //Load an Excel sample document
            workbook.LoadFromFile(@"sample.xlsx");

            //Get the first worksheet of the document 
            Worksheet sheet = workbook.Worksheets[0];
           
            //Save the worksheet to HTML
            sheet.SaveToHtml("ExcelToHTML.html");
        }
    }
}

Imports Spire.Xls
Namespace Xls2Html

    Class Program
        Private Shared Sub Main(args As String())
            'Create a Workbook instance
            Dim workbook As New Workbook()

            'Load an Excel sample document
            workbook.LoadFromFile("sample.xlsx")

            'Get the first worksheet of the document
            Dim sheet As Worksheet = workbook.Worksheets(0)

            'Save the worksheet to HTML
            sheet.SaveToHtml("ExcelToHTML.html");

        End Sub
    End Class
End Namespace

using Spire.Xls;
using Spire.Xls.Core.Spreadsheet;

namespace XLSToHTML

{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Workbook instance
            Workbook workbook = new Workbook();             
   
            //Load an Excel sample document
            workbook.LoadFromFile(@"sample.xlsx");
   
            //Get the first worksheet of the document 
            Worksheet sheet = workbook.Worksheets[0];
  
            //Create an HTMLOptions instance
            HTMLOptions options = new HTMLOptions();
  
            //Embed images to HTML
            options.ImageEmbedded = true;
  
            //Save the worksheet to HTML
            sheet.SaveToHtml("XLS2HTML.html", options);
        }
    }
}

Imports Spire.Xls
Imports Spire.Xls.Core.Spreadsheet

Namespace Xls2Html

    Class Program
        Private Shared Sub Main(args As String())
            'Create a Workbook instance
            Dim workbook As New Workbook()

            'Load an Excel sample document
            workbook.LoadFromFile("sample.xlsx")

            'Get the first worksheet of the document
            Dim sheet As Worksheet = workbook.Worksheets(0)

            'Create an HTMLOptions instance
            Dim options As New HTMLOptions()

            'Embed images to HTML
            options.ImageEmbedded = True

            'Save the worksheet to HTML
            sheet.SaveToHtml("XLS2HTML.html", options);

        End Sub
    End Class

PM> Install-Package Spire.Doc

using Spire.Doc;

namespace ConvertToRtf
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Word document instance
            Document document = new Document();

            //Load a Word sample document
            document.LoadFromFile("sample.docx");

            // Save the document to RTF
            document.SaveToFile("Result.rtf", FileFormat.Rtf);
        }

    }
}

Imports Spire.Doc

Namespace ConvertToRtf
    
    Class Program
        
        Private Shared Sub Main(ByVal args() As String)
            'Create a Word document instance
            Dim document As Document = New Document
            'Load a Word sample document
            document.LoadFromFile("sample.docx")
            'Save the document to RTF
            document.SaveToFile("Result.rtf", FileFormat.Rtf)
        End Sub
    End Class
End Namespace

using Spire.Doc;
using System;

public class RtfToDocDocx
{

    public static void Main(String[] args)
    {
        // Create a Document instance
        Document document = new Document();
        // Load an RTF document
        document.LoadFromFile("input.rtf", FileFormat.Rtf);
        // Save the document to Doc
        document.SaveToFile("toDoc.doc", FileFormat.Doc);
        // Save the document to Docx
        document.SaveToFile("toDocx.docx", FileFormat.Docx2013);
    }
}

Imports Spire.Doc
Imports System
Public Class RtfToDocDocx
    
    Public Shared Sub Main(ByVal args() As String)
        ' Create a Document instance
        Dim document As Document = New Document
        ' Load an RTF document
        document.LoadFromFile("input.rtf", FileFormat.Rtf)
        ' Save the document to Doc
        document.SaveToFile("toDoc.doc", FileFormat.Doc)
        ' Save the document to Docx
        document.SaveToFile("toDocx.docx", FileFormat.Docx2013)
    End Sub
End Class

PM> Install-Package Spire.Doc

using Spire.Doc;
using System;

namespace DocExample
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Create a Document class instance
            Document document = new Document();

            //Load an OpenXML file from disk
            document.LoadFromFile(@"C:\Samples\Sample.xml", FileFormat.Xml);

            //Convert the OpenXML file to a Word document and save it
            document.SaveToFile("OpenXMLToWord.docx", FileFormat.Docx2013);
        }
    }
}

Imports System
Imports Spire.Doc

Module Program
    Sub Main(args As String())
        'Create a Document class instance
        Dim document As New Document()

        'Load an OpenXML file from disk
        document.LoadFromFile("C:\Samples\Sample.xml", FileFormat.Xml)

        'Convert the OpenXML file to a Word document and save it
        document.SaveToFile("OpenXMLToWord.docx", FileFormat.Docx2013)
    End Sub
End Module

using Spire.Doc;
using System;

namespace DocExample
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Create a Document class instance
            Document document = new Document();

            //Load a Word document from disk
            document.LoadFromFile(@"C:\Samples\Sample.docx");

            //Convert the Word document to an OpenXML file and save it
            //Change WordXML to WordML to convert to ML file
            document.SaveToFile("WordToOpenXMl.xml", FileFormat.WordXml);
        }
    }
}

Imports System
Imports Spire.Doc

Module Program
    Sub Main(args As String())
        'Create a Document class instance
        Dim document As New Document()

        'Load a Word document from disk
        document.LoadFromFile("C:\Samples\Sample.docx")

        'Convert the Word document to an OpenXML file and save it
        'Change WordXML to WordML to convert to ML file
        document.SaveToFile("WordToOpenXML.xml", FileFormat.WordXml)
    End Sub
End Module

PM> Install-Package Spire.Doc

using System;
using Spire.Doc;
using Spire.Doc.Documents;

namespace ConvertHTMLtoWord
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Create an instance of Document
            Document document = new Document();

            //Load an HTML file form disk
            document.LoadFromFile(@"D:\testp\test.html");
            

            //Save the HTML file as Word
            String result = "HtmltoWord.docx";
            document.SaveToFile(result, FileFormat.Docx2013);
        }
   }
}

Imports System
Imports Spire.Doc
Imports Spire.Doc.Documents

Module Program
    Sub Main(args As String())
        'Create an instance of Document
        Dim document As New Document()

        'Load an HTML file form disk
        document.LoadFromFile("D:\testp\test.html")

        'Save the HTML file as Word
        Dim result As String = "HtmltoWord.docx"
        document.SaveToFile(result, FileFormat.Docx2013)
    End Sub
End Module

PM> Install-Package Spire.Doc

using Spire.Doc;

namespace WordToHTML
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document mydoc = new Document();

            //Load a Word document
            mydoc.LoadFromFile("sample.docx");

            //Save to HTML
            mydoc.SaveToFile("WordToHTML.html", FileFormat.Html);
        }
    }
}

Imports Spire.Doc
Namespace WordToHTML
    Class Program
        Shared Sub Main(ByVal args() As String)
            'Create a Document document
            Dim document As Document = New Document
            'Load a Word sample document
            document.LoadFromFile("sample.docx")
            'Save to HTML
            document.SaveToFile("toHTML.html", FileFormat.Html)

        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Doc

using Spire.Doc;

namespace ConvertTextToWord
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Document class
            Document doc = new Document();
            //Load a text file
            doc.LoadText("Sample.txt");

            //Save the text file in Word format
            doc.SaveToFile("TextToWord.docx", FileFormat.Docx2016);
            doc.Close();
        }
    }
}

Imports Spire.Doc

Namespace ConvertTextToWord
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Document class
            Dim doc As Document = New Document()
            'Load a text file
            doc.LoadText("Sample.txt")

            'Save the text file in Word format
            doc.SaveToFile("TextToWord.docx", FileFormat.Docx2016)
            doc.Close()
        End Sub
    End Class
End Namespace

using Spire.Doc;

namespace ConvertWordToText
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Document class
            Document doc = new Document();
            //Load a Word file
            doc.LoadFromFile(@"Sample.docx");

            //Save the Word file in text format
            doc.SaveToFile("WordToText.txt", FileFormat.Txt);
            doc.Close();
        }
    }
}

Imports Spire.Doc

Namespace ConvertWordToText
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Document class
            Dim doc As Document = New Document()
            'Load a Word file
            doc.LoadFromFile("Sample.docx")

            'Save the Word file in text format
            doc.SaveToFile("WordToText.txt", FileFormat.Txt)
            doc.Close()
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.PDF

using System.Drawing;
using Spire.Pdf;
using Spire.Pdf.Graphics;

namespace AddImageToPdf
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a PdfDocument object
            PdfDocument doc = new PdfDocument();

            //Set the margins
            doc.PageSettings.SetMargins(20);

            //Add a page
            PdfPageBase page = doc.Pages.Add();

            //Load an image 
            Image image = Image.FromFile(@"C:\Users\Administrator\Desktop\announcement.jpg");

            //Get the image width and height
            float width = image.PhysicalDimension.Width;
            float height = image.PhysicalDimension.Height;
       
            //Declare a PdfImage variable
            PdfImage pdfImage;

            //If the image width is larger than page width
            if (width > page.Canvas.ClientSize.Width)
            {
                //Resize the image to make it to fit to the page width
                float widthFitRate = width / page.Canvas.ClientSize.Width;
                Size size = new Size((int)(width / widthFitRate), (int)(height / widthFitRate));
                Bitmap scaledImage = new Bitmap(image, size);

                //Load the scaled image to the PdfImage object
                pdfImage = PdfImage.FromImage(scaledImage);
            } else
            {
                //Load the original image to the PdfImage object
                pdfImage = PdfImage.FromImage(image);
            }

            //Draw image at (0, 0)
            page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height);

            //Save to file
            doc.SaveToFile("AddImage.pdf");
        }
    }
}

Imports System.Drawing
Imports Spire.Pdf
Imports Spire.Pdf.Graphics
 
Namespace AddImageToPdf
    Class Program
        Shared  Sub Main(ByVal args() As String)
            'Create a PdfDocument object
            Dim doc As PdfDocument =  New PdfDocument() 
 
            'Set the margins
            doc.PageSettings.SetMargins(20)
 
            'Add a page
            Dim page As PdfPageBase =  doc.Pages.Add() 
 
            'Load an image 
            Dim image As Image =  Image.FromFile("C:\Users\Administrator\Desktop\announcement.jpg") 
 
            'Get the image width and height
            Dim width As single =  image.PhysicalDimension.Width 
            Dim height As single =  image.PhysicalDimension.Height 
 
            'Declare a PdfImage variable
            Dim pdfImage As PdfImage
 
            'If the image width is larger than page width
            If width > page.Canvas.ClientSize.Width Then
                'Resize the image to make it to fit to the page width
                Dim widthFitRate As single =  width / page.Canvas.ClientSize.Width 
                Dim size As Size =  New Size(CType((width / widthFitRate),(Integer)(height / widthFitRate), Integer)) 
                Dim scaledImage As Bitmap =  New Bitmap(image,size) 
 
                'Load the scaled image to the PdfImage object
                pdfImage = PdfImage.FromImage(scaledImage)
            Else 
                'Load the original image to the PdfImage object
                pdfImage = PdfImage.FromImage(image)
            End If
 
            'Draw image at (0, 0)
            page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height)
 
            'Save to file
            doc.SaveToFile("AddImage.pdf")
        End Sub
    End Class
End Namespace

using System.Drawing;
using Spire.Pdf;
using Spire.Pdf.Graphics;

namespace ConvertImageToPdfWithSameSize
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a PdfDocument object
            PdfDocument doc = new PdfDocument();

            //Set the margins to 0
            doc.PageSettings.SetMargins(0);

            //Load an image 
            Image image = Image.FromFile(@"C:\Users\Administrator\Desktop\announcement.jpg");

            //Get the image width and height
            float width = image.PhysicalDimension.Width;
            float height = image.PhysicalDimension.Height;

            //Add a page of the same size as the image
            PdfPageBase page = doc.Pages.Add(new SizeF(width, height));

            //Create a PdfImage object based on the image
            PdfImage pdfImage = PdfImage.FromImage(image);
 
            //Draw image at (0, 0) of the page
            page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height);

            //Save to file
            doc.SaveToFile("ConvertPdfWithSameSize.pdf");
        }
    }
}

Imports System.Drawing
Imports Spire.Pdf
Imports Spire.Pdf.Graphics
 
Namespace ConvertImageToPdfWithSameSize
    Class Program
        Shared  Sub Main(ByVal args() As String)
            'Create a PdfDocument object
            Dim doc As PdfDocument =  New PdfDocument() 
 
            'Set the margins to 0
            doc.PageSettings.SetMargins(0)
 
            'Load an image 
            Dim image As Image =  Image.FromFile("C:\Users\Administrator\Desktop\announcement.jpg") 
 
            'Get the image width and height
            Dim width As single =  image.PhysicalDimension.Width 
            Dim height As single =  image.PhysicalDimension.Height 
 
            'Add a page of the same size as the image
            Dim page As PdfPageBase =  doc.Pages.Add(New SizeF(width,height)) 
 
            'Create a PdfImage object based on the image
            Dim pdfImage As PdfImage =  PdfImage.FromImage(image) 
 
            'Draw image at (0, 0) of the page
            page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height)
 
            'Save to file
            doc.SaveToFile("ConvertPdfWithSameSize.pdf")
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Doc

using Spire.Doc;

namespace XMLToPDF
{
   class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document mydoc = new Document();
            //Load an XML sample document
            mydoc.LoadFromFile(@"XML Sample.xml", FileFormat.Xml);
            //Save it to PDF
            mydoc.SaveToFile("XMLToPDF.pdf", FileFormat.PDF);
            
        }
    }
}

Imports Spire.Doc
Namespace XMLToPDF
    Class Program
        Shared Sub Main(ByVal args() As String)
            'Create a Document instance
            Dim mydoc As Document = New Document()
            'Load an XML sample document
            mydoc.LoadFromFile("XML Sample.xml", FileFormat.Xml)
            'Save it to PDF
            mydoc.SaveToFile("XMLToPDF.pdf", FileFormat.PDF)

        End Sub
    End Class
End Namespace