How to use Numeric Character Reference
in C# and VB.Net.


Complete code 

using System;
using System.IO;
using System.Text;

namespace Sample
{
    class sample
    {
        static void Main(string[] args)
        {
            string inpFile = @"..\..\unicode.rtf";
            string outFileNCR = @"NCR.html";
            string outFileNoNCR = @"Without NCR.html";

            SautinSoft.RtfToHtml r = new SautinSoft.RtfToHtml();            

            try
            {
                r.OpenRtf(inpFile);

                // Set to use NCR (Numeric Character Reference), in other words
                // write characters as &#XXXX;
                r.UseNumericCharacterReference = true;
                r.TextStyle.Title = "NCR";
                r.ToHtml(outFileNCR);

                // Don't use NCR, write characters us Unicode (utf-8), like a: på taket är en figur. 
                r.UseNumericCharacterReference = false;
                r.TextStyle.Title = "Without NCR";
                r.ToHtml(outFileNoNCR);

                // Open the results for demonstration purposes.
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFileNCR)
                { UseShellExecute = true });
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFileNoNCR)
                { UseShellExecute = true });
            }
            catch (Exception e)
            {
                Console.WriteLine($"Error: {e.Message}");
                Console.WriteLine("Press any key ...");
                Console.ReadKey();
            }
        }
    }
}

Download. 

        
            Imports System
Imports System.IO
Imports System.Text

Namespace Sample
    Friend Class sample
        Shared Sub Main(ByVal args() As String)
            Dim inpFile As String = "..\..\unicode.rtf"
            Dim outFileNCR As String = "NCR.html"
            Dim outFileNoNCR As String = "Without NCR.html"

            Dim r As New SautinSoft.RtfToHtml()

            Try
                r.OpenRtf(inpFile)

                ' Set to use NCR (Numeric Character Reference), in other words
                ' write characters as &#XXXX;
                r.UseNumericCharacterReference = True
                r.TextStyle.Title = "NCR"
                r.ToHtml(outFileNCR)

                ' Don't use NCR, write characters us Unicode (utf-8), like a: på taket är en figur. 
                r.UseNumericCharacterReference = False
                r.TextStyle.Title = "Without NCR"
                r.ToHtml(outFileNoNCR)

                ' Open the results for demonstration purposes.
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFileNCR) With {.UseShellExecute = True})
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFileNoNCR) With {.UseShellExecute = True})
            Catch e As Exception
                Console.WriteLine($"Error: {e.Message}")
                Console.WriteLine("Press any key ...")
                Console.ReadKey()
            End Try
        End Sub
    End Class
End Namespace

Download.

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