ImmutableEnumerableDebuggerProxy.cs

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using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
 
namespace System.Collections.Immutable;
 
internal class ImmutableEnumerableDebuggerProxy<T>
{
    private readonly IEnumerable<T> _enumerable;
 
    private T[] _cachedContents;
 
    [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
    public T[] Contents => _cachedContents ?? (_cachedContents = _enumerable.ToArray());
 
    public ImmutableEnumerableDebuggerProxy(IEnumerable<T> enumerable)
    {
        Requires.NotNull(enumerable, "enumerable");
        _enumerable = enumerable;
    }
}