SystemLinq_GroupingDebugView.cs

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using System.Diagnostics;
 
namespace System.Linq;
 
internal sealed class SystemLinq_GroupingDebugView<TKey, TElement>
{
    private readonly Grouping<TKey, TElement> _grouping;
 
    private TElement[] _cachedValues;
 
    public TKey Key => _grouping.Key;
 
    [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
    public TElement[] Values => _cachedValues ?? (_cachedValues = _grouping.ToArray());
 
    public SystemLinq_GroupingDebugView(Grouping<TKey, TElement> grouping)
    {
        _grouping = grouping;
    }
}