initial commit

CSharp/Controls/LogViewer.Avalonia/Converters/ChangeColorTypeConverter.cs

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+using System;
+using System.Globalization;
+using Avalonia.Data.Converters;
+using Avalonia.Media;
+using SysDrawColor = System.Drawing.Color;
+
+namespace LogViewer.Avalonia.Converters;
+
+public class ChangeColorTypeConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is null)
+            return new SolidColorBrush((Color)(parameter ?? Colors.Black));
+
+        SysDrawColor sysDrawColor = (SysDrawColor)value!;
+        return new SolidColorBrush(Color.FromArgb(
+            sysDrawColor.A,
+            sysDrawColor.R,
+            sysDrawColor.G,
+            sysDrawColor.B));
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotImplementedException();
+}

CSharp/Controls/LogViewer.Avalonia/Converters/EventIdConverter.cs

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+using System.Globalization;
+using Avalonia.Data.Converters;
+using Microsoft.Extensions.Logging;
+
+namespace LogViewer.Avalonia.Converters;
+
+public class EventIdConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is null)
+            return "0";
+
+        EventId eventId = (EventId)value;
+
+        return eventId.ToString();
+    }
+
+    // If not implemented, an error is thrown
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => new EventId(0, value?.ToString() ?? string.Empty);
+}