FireDrillSystem/Assets/Scripts/Common/Serialization/LinqExpressions/LinqInternal/Collections/Specialized/ExtendedEnumerable.cs

// Needed for NET35 (BigInteger)
#if !NET_4_6
using System.Collections.Generic;

namespace LinqInternal.Collections.Specialized
{
    [System.Diagnostics.DebuggerNonUserCode]
    internal sealed class ExtendedEnumerable<T> : ExtendedEnumerableBase<T>, IEnumerable<T>
    {
        public ExtendedEnumerable(IEnumerable<T> target, IEnumerable<T> append)
            : base(target, append)
        {
            //Empty
        }

        public override IEnumerator<T> GetEnumerator()
        {
            foreach (var item in Target)
            {
                yield return item;
            }
            foreach (var item in Append)
            {
                yield return item;
            }
        }
    }
}
#endif