Initializes a new instance of the PropertyDescriptor class with the name in the specified MemberDescriptor and the attributes in both the MemberDescriptor and the Attribute array.
attrs:Attribute -> PropertyDescriptor
A MemberDescriptor containing the name of the member and its attributes.
An Attribute array containing the attributes you want to associate with the property.
This constructor appends the attributes in the Attribute array to the attributes in the MemberDescriptor.