BGC.Parameters.AppendAdditionAttribute.AppendAdditionAttribute C# (CSharp) Method

        public AppendAdditionAttribute(params Type[] additionTypes)
        {
            for (int i = 0; i < additionTypes.Length; i++)
            {
                if (!typeof(IPropertyGroup).IsAssignableFrom(additionTypes[i]))
                {
                    throw new ArgumentException($"AdditionType must implement IPropertyGroup: {additionTypes[i]}");
                }
            }

            this.additionTypes = additionTypes.Clone() as Type[];
        }
    }