public void RequiresArgument_LengthEquals_ThrowsOnWrongSizeArray()
        {
            // Arrange
            var arr = new[] { 1, 2 };

            // Act
            RequiresArgument.LengthEquals(arr, 3, "Array should contain 3 elements.");
        }
        public void RequiresArgument_LengthEquals_DoesNothingOnRightSizeArray()
        {
            // Arrange
            var arr = new[] { 1, 2, 3 };

            // Act
            RequiresArgument.LengthEquals(arr, 3, "Array should contain 3 elements.");
        }