You need to create a custom attribute.
Create a class that derives from the abstract (MustInherit) base class System.Attribute. Implement constructors, fields, and properties to allow users to configure the attribute. Apply the System. AttributeUsageAttribute attribute to your class to define the following:
Which program elements are valid targets of the attribute
Whether you can apply more than one instance of the attribute to a program element
Whether the attribute is inherited by derived types
How It Works
Attributes provide a mechanism for associating declarative information (metadata) with program elements. This metadata is contained in the compiled assembly, allowing programs to retrieve it ...