avalonia/AvaloniaApplication1/Resources/ImageConverter.cs

using Avalonia.Data.Converters;
using Avalonia.Media.Imaging;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AvaloniaApplication1.Resources
{
    internal class ImageConverter : IValueConverter
    {
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value is byte[]) return new Bitmap(new MemoryStream((byte[])value));
            return null;
        }

        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}