System.Reflection.Module.IsDefined C# (CSharp) Method

        public virtual bool IsDefined (Type attributeType, bool inherit)
        {
            if (attributeType == null)
                throw new ArgumentNullException("attributeType");

            RuntimeType attributeRuntimeType = attributeType.UnderlyingSystemType as RuntimeType;

            if (attributeRuntimeType == null) 
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"),"caType");

            return CustomAttribute.IsDefined(this, attributeRuntimeType);
        }
        

        public static bool IsDefined(Module element, Type attributeType, bool inherit)
        {
            // Returns true is a custom attribute subclass of attributeType class/interface with no inheritance walk
            if (element == null)
                throw new ArgumentNullException(nameof(element));

            if (attributeType == null)
                throw new ArgumentNullException(nameof(attributeType));

            if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
                throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
            Contract.EndContractBlock();

            return element.IsDefined(attributeType,false);
        }