EnumerableTypeInfo.cs

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using System.Collections;
using System.Collections.Generic;
 
namespace System.Diagnostics.Tracing;
 
internal sealed class EnumerableTypeInfo : TraceLoggingTypeInfo
{
    private readonly TraceLoggingTypeInfo elementInfo;
 
    internal TraceLoggingTypeInfo ElementInfo => elementInfo;
 
    public EnumerableTypeInfo(Type type, TraceLoggingTypeInfo elementInfo)
        : base(type)
    {
        this.elementInfo = elementInfo;
    }
 
    public override void WriteMetadata(TraceLoggingMetadataCollector collector, string name, EventFieldFormat format)
    {
        collector.BeginBufferedArray();
        elementInfo.WriteMetadata(collector, name, format);
        collector.EndBufferedArray();
    }
 
    public override void WriteData(PropertyValue value)
    {
        int bookmark = TraceLoggingDataCollector.BeginBufferedArray();
        int num = 0;
        IEnumerable enumerable = (IEnumerable)value.ReferenceValue;
        if (enumerable != null)
        {
            foreach (object item in enumerable)
            {
                elementInfo.WriteData(elementInfo.PropertyValueFactory(item));
                num++;
            }
        }
        TraceLoggingDataCollector.EndBufferedArray(bookmark, num);
    }
 
    public override object GetData(object value)
    {
        IEnumerable enumerable = (IEnumerable)value;
        List<object> list = new List<object>();
        foreach (object item in enumerable)
        {
            list.Add(elementInfo.GetData(item));
        }
        return list.ToArray();
    }
}