ImmutableListBuilderDebuggerProxy.cs

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using System.Diagnostics;
 
namespace System.Collections.Immutable;
 
internal sealed class ImmutableListBuilderDebuggerProxy<T>
{
    private readonly ImmutableList<T>.Builder _list;
 
    private T[] _cachedContents;
 
    [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
    public T[] Contents
    {
        get
        {
            if (_cachedContents == null)
            {
                _cachedContents = _list.ToArray(_list.Count);
            }
            return _cachedContents;
        }
    }
 
    public ImmutableListBuilderDebuggerProxy(ImmutableList<T>.Builder builder)
    {
        Requires.NotNull(builder, "builder");
        _list = builder;
    }
}