XAML-Map-Control/MapControl/Shared/BoundingBox.cs

using System;
using System.Globalization;

namespace MapControl;

/// <summary>
/// A geographic bounding box with south and north latitude and west and east longitude values in degrees.
/// </summary>
#if UWP || WINUI
[Windows.Foundation.Metadata.CreateFromString(MethodName = "Parse")]
#else
[System.ComponentModel.TypeConverter(typeof(BoundingBoxConverter))]
#endif
public class BoundingBox(double latitude1, double longitude1, double latitude2, double longitude2)
{
    public double South { get; } = Math.Min(Math.Max(Math.Min(latitude1, latitude2), -90d), 90d);
    public double North { get; } = Math.Min(Math.Max(Math.Max(latitude1, latitude2), -90d), 90d);
    public double West { get; } = Math.Min(longitude1, longitude2);
    public double East { get; } = Math.Max(longitude1, longitude2);

    public override string ToString()
    {
        return string.Format(CultureInfo.InvariantCulture, "{0},{1},{2},{3}", South, West, North, East);
    }

    /// <summary>
    /// Creates a BoundingBox instance from a string containing a comma-separated sequence of four floating point numbers.
    /// </summary>
    public static BoundingBox Parse(string boundingBox)
    {
        string[] values = null;

        if (!string.IsNullOrEmpty(boundingBox))
        {
            values = boundingBox.Split(',');
        }

        if (values == null || values.Length != 4 && values.Length != 5)
        {
            throw new FormatException($"{nameof(BoundingBox)} string must contain a comma-separated sequence of four floating point numbers.");
        }

        return new BoundingBox(
            double.Parse(values[0], NumberStyles.Float, CultureInfo.InvariantCulture),
            double.Parse(values[1], NumberStyles.Float, CultureInfo.InvariantCulture),
            double.Parse(values[2], NumberStyles.Float, CultureInfo.InvariantCulture),
            double.Parse(values[3], NumberStyles.Float, CultureInfo.InvariantCulture));
    }
}