U+202A:   LEFT-TO-RIGHT EMBEDDING (LRE)
U+202B:   RIGHT-TO-LEFT EMBEDDING (RLE)
U+202D:   LEFT-TO-RIGHT OVERRIDE (LRO)
U+202E:   RIGHT-TO-LEFT OVERRIDE (RLO)
U+202C:   POP DIRECTIONAL FORMATTING (PDF)

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public const char RightToLeftEmbedding = (char)0x202B;

  Right-to-left Unicode blocks for modern scripts are:

 Consecutive range of the main letters:
 U+0590 to U+05FF - Hebrew
 U+0600 to U+06FF - Arabic
 U+0700 to U+074F - Syriac
 U+0750 to U+077F - Arabic Supplement
 U+0780 to U+07BF - Thaana
 U+07C0 to U+07FF - N'Ko
 U+0800 to U+083F - Samaritan

 Arabic Extended:
 U+08A0 to U+08FF - Arabic Extended-A

 Consecutive presentation forms:
 U+FB1D to U+FB4F - Hebrew presentation forms
 U+FB50 to U+FDFF - Arabic presentation forms A

 More Arabic presentation forms:
 U+FE70 to U+FEFF - Arabic presentation forms B

private static readonly Regex _matchArabicHebrew =
new Regex(@"[\u0600-\u06FF,\u0590-\u05FF]", RegexOptions.IgnoreCase | RegexOptions.Compiled);

  public static bool ContainsRtlFarsi(this string txt)
  {
       return !string.IsNullOrEmpty(txt) && _matchArabicHebrew.IsMatch(txt);
  }

// crate a surface
var info = new SKImageInfo(256, 256);
using var surface = SKSurface.Create(info);
// the the canvas and properties
var canvas = surface.Canvas;

// make sure the canvas is blank
canvas.Clear(SKColors.White);

// draw some text
using var typeface = SKTypeface.FromFamilyName("Tahoma");
using var paint = new SKPaint
    {
      Color = SKColors.Black,
      IsAntialias = true,
      Style = SKPaintStyle.Fill,
      TextAlign = SKTextAlign.Center,
      TextSize = 24,
      Typeface = typeface,
    };
var coord = new SKPoint(info.Width / 2, (info.Height + paint.TextSize) / 2);
canvas.DrawText("آزمایش", coord, paint);

// save the file
using var image = surface.Snapshot();
using var data = image.Encode(SKEncodedImageFormat.Png, 100);
using var stream = File.OpenWrite("farsi-text-1.png");
data.SaveTo(stream);

<ItemGroup>
   <PackageReference Include="SkiaSharp" Version="2.88.3" />
</ItemGroup>

<ItemGroup>
   <PackageReference Include="SkiaSharp" Version="2.88.3" />
   <PackageReference Include="SkiaSharp.HarfBuzz" Version="2.88.3" />
</ItemGroup>

// crate a surface
var info = new SKImageInfo(256, 256);
using var surface = SKSurface.Create(info);
// the the canvas and properties
var canvas = surface.Canvas;

// make sure the canvas is blank
canvas.Clear(SKColors.White);

// draw some text
using var typeface = SKTypeface.FromFamilyName("Tahoma");
using var shaper = new SKShaper(typeface);
using var paint = new SKPaint
  {
      Color = SKColors.Black,
      IsAntialias = true,
      Style = SKPaintStyle.Fill,
      TextAlign = SKTextAlign.Center,
      TextSize = 24,
      Typeface = typeface,
  };
var coord = new SKPoint(info.Width / 2, (info.Height + paint.TextSize) / 2);
canvas.DrawShapedText(shaper, "آزمایش", coord, paint);

// save the file
using var image = surface.Snapshot();
using var data = image.Encode(SKEncodedImageFormat.Png, 100);
using var stream = File.OpenWrite("farsi-text-2.png");
data.SaveTo(stream);

using System;

namespace CultureAndNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            var number = Convert.ToDecimal("12.32");
            Console.WriteLine(number);
        }
    }
}

    public class CultureScope : IDisposable
    {
        private readonly CultureInfo _originalCulture;

        public CultureScope(string culture)
        {
            _originalCulture = Thread.CurrentThread.CurrentCulture;
            Thread.CurrentThread.CurrentCulture = new CultureInfo(culture);
        }

        public void Dispose()
        {
            Thread.CurrentThread.CurrentCulture = _originalCulture;
        }
    }

using (var cultureScope = new CultureScope("fa-IR"))
{
   Console.WriteLine(Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator);
   var number = decimal.Parse("12.32");
   Console.WriteLine(number);
}

 using (var cultureScope = new CultureScope("fa-IR"))
{
   Console.WriteLine(Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator);
   var number = decimal.Parse("12.32", new CultureInfo("en"));
   Console.WriteLine(number);
}

 using (var cultureScope = new CultureScope("fa-IR"))
{
   Console.WriteLine(Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator);
   var number = decimal.Parse("12.32", CultureInfo.InvariantCulture);
   Console.WriteLine(number);
}

var privateFontCollection = new PrivateFontCollection();                            
privateFontCollection.AddFontFile(fontPath);
var fontFamily = privateFontCollection.Families[0];
var font = new Font(fontFamily);