A simple object pool. #speedcode

Pool.cs

public class Pool<T> where T : new()
{
    private readonly T[] mPool;
    private int mNextAvailable;
    
    public Pool(int capacity)
    {
        mPool = new T[capacity];
        for (int i = 0; i < capacity; ++i)
        {
            mPool[i] = new T();
        }
        
        mNextAvailable = 0;
    }
    
    public T Reserve()
    {
        if (mNextAvailable < mPool.Length)
        {
            T obj = mPool[mNextAvailable];
            mPool[mNextAvailable++] = default(T);
            return obj;
        }
        else
        {    
            return default(T);
        }
    }
    
    public void Release(T obj)
    {
        if (mNextAvailable > 0)
        {
            mPool[--mNextAvailable] = obj;
        }
    }
}