Check if an Enum Value Exists in Another Enum in C#

 bool IsDefine<T1, T2>(T2 t)
  where T1 : Enum
  where T2 : Enum
{
	var value = Unsafe.As<T2, T1>(ref t);
	var array = Enum.GetValues(typeof(T1));
	return (Array.BinarySearch(array, value) >= 0);
}

        public static class EnumTool<T1, T2>
         where T1 : Enum
         where T2 : Enum
        {
            private static TCache<T1> _cache;
            private class TCache<T>
            {
                public TCache(Array array)
                {
                    Array = array;
                }
                public Array Array { get; private set; }
            }

            static EnumTool()
            {
                _cache = new TCache<T1>(Enum.GetValues(typeof(T1)));
            }
            public static bool IsDefine(T2 t)
            {
                var value = Unsafe.As<T2, T1>(ref t);
                return (Array.BinarySearch(_cache.Array, value) >= 0);
            }
        }

public static class EnumTool<T1, T2>
 where T1 : Enum
 where T2 : Enum
{
	private static TCache<T1> _cache;
	private class TCache<T>
	{
		public TCache(int[] array)
		{
			Array = array;
		}
		public int[] Array { get; private set; }
	}

	static EnumTool()
	{
		var values = Enum.GetValues(typeof(T1));
		int[] array = new int[values.Length];
		for (int i = 0; i < values.Length; i++)
		{
			array[i] = (int)values.GetValue(i)!;
		}
		_cache = new TCache<T1>(array);
	}
	public static bool IsDefine(T2 t)
	{
		var value = Unsafe.As<T2, T1>(ref t);
		return (Array.BinarySearch(_cache.Array, value) >= 0);
	}
}
    public SelectedItem[] s = new SelectedItem[]
    {
        new SelectedItem("1","1"),
        new SelectedItem("2","2")
    };
    private PrintModal<导出模板管理>? printModal;

    private Task OpenPrint()
    {
        return printModal!.OpenDialog();
    }
}