How to set HTML version
using C# and VB.NET


Complete code 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using SautinSoft.RtfToHtml;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            SetHtmlVersion();
        }
        /// <summary>
        /// This sample shows how to set HTML version: xhtml, html5, html401, html32.
        /// </summary>
        static void SetHtmlVersion()
        {
            string inpFile = @"..\..\..\..\example.docx";
            string outFile = @"Result.html";

            RtfToHtml r = new RtfToHtml();

            // Let's convert to the HTML 3.2
            HtmlFlowingSaveOptions opt = new HtmlFlowingSaveOptions()
            {
                Version = HtmlVersion.Html32
            };

            try
            {
                r.Convert(inpFile, outFile, opt);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Conversion failed! {ex.Message}");
            }

            // Open the result.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
        }
    }
}

Download. 

        
            Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.IO
Imports SautinSoft.RtfToHtml

Namespace Example
	Friend Class Program
		Shared Sub Main(ByVal args() As String)
			SetHtmlVersion()
		End Sub
		''' <summary>
		''' This sample shows how to set HTML version: xhtml, html5, html401, html32.
		''' </summary>
		Private Shared Sub SetHtmlVersion()
			Dim inpFile As String = "..\..\..\..\example.docx"
			Dim outFile As String = "Result.html"

			Dim r As New RtfToHtml()

			' Let's convert to the HTML 3.2
			Dim opt As New HtmlFlowingSaveOptions() With {.Version = HtmlVersion.Html32}

			Try
				r.Convert(inpFile, outFile, opt)
			Catch ex As Exception
				Console.WriteLine($"Conversion failed! {ex.Message}")
			End Try

			' Open the result.
			System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
		End Sub
	End Class
End Namespace

Download.

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