DisplayModeCollection.cs

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using System.Collections;
using System.Collections.Generic;
 
namespace Microsoft.Xna.Framework.Graphics;
 
public class DisplayModeCollection : IEnumerable<DisplayMode>, IEnumerable
{
    private List<DisplayMode> _displayModes;
 
    public IEnumerable<DisplayMode> this[SurfaceFormat format]
    {
        get
        {
            List<DisplayMode> list = new List<DisplayMode>();
            foreach (DisplayMode displayMode in _displayModes)
            {
                if (displayMode.Format == format)
                {
                    list.Add(displayMode);
                }
            }
            return list;
        }
    }
 
    internal DisplayModeCollection(List<DisplayMode> displayModes)
    {
        _displayModes = displayModes;
    }
 
    public IEnumerator<DisplayMode> GetEnumerator()
    {
        return _displayModes.GetEnumerator();
    }
 
    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}