IDS4-Net8-Default/Source/Core/Long.Core/Extensions/CollectionExtensions.cs

namespace Long.Core.Extensions;

public static class CollectionExtensions
{
    public static bool IsNullOrEmpty<T>(this ICollection<T> source)
    {
        if (source != null)
        {
            return source.Count <= 0;
        }

        return true;
    }

    public static bool AddIfNotContains<T>(this ICollection<T> source, T item)
    {
        if (source == null)
        {
            throw new ArgumentNullException("source");
        }

        if (source.Contains(item))
        {
            return false;
        }

        source.Add(item);
        return true;
    }
}