GrowingArray.cs

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namespace System.Linq.Parallel;
 
internal sealed class GrowingArray<T>
{
    private T[] _array;
 
    private int _count;
 
    internal T[] InternalArray => _array;
 
    internal GrowingArray()
    {
        _array = new T[1024];
        _count = 0;
    }
 
    internal void Add(T element)
    {
        if (_count >= _array.Length)
        {
            GrowArray(2 * _array.Length);
        }
        _array[_count++] = element;
    }
 
    private void GrowArray(int newSize)
    {
        T[] array = new T[newSize];
        _array.CopyTo(array, 0);
        _array = array;
    }
 
    internal void CopyFrom(T[] otherArray, int otherCount)
    {
        if (_count + otherCount > _array.Length)
        {
            GrowArray(_count + otherCount);
        }
        Array.Copy(otherArray, 0, _array, _count, otherCount);
        _count += otherCount;
    }
}