Attribute Targets

Standardized attribute names

Console.WriteLine(string.Join(", ", Enum.GetNames(typeof(AttributeTargets))));
// Assembly, Module, Class, Struct, Enum, Constructor, Method, Property, Field, Event, Interface, Parameter, Delegate, ReturnValue, GenericParameter, All

Explicit attribute target

Target name	Context
event	event
field	field, auto property, field-like event
method	constructor, finalizer, method, operator, property getter and setter, indexer getter and setter, field-like event
param	property setter, indexer setter, parameter of a constructor or a method or a operator
property	property, indexer
return	method, operator, property getter and setter, indexer getter and setter, delegate
type	class, struct, interface, enum, delegate
typevar	type parameter
assembly	global
module	global

[assembly: MyAttribute]
[module: MyAttribute]

[AttributeUsage(AttributeTargets.All)]
class MyAttributeAttribute : Attribute { }

[type: MyAttribute]
[method: MyAttribute] // apply to primary constructor
class C<[typevar: MyAttribute] T>([param: MyAttribute] T a)
{
    [return: MyAttribute]
    private delegate void MyDelegate<[typevar: MyAttribute] U>([param: MyAttribute] U a);

    [field: MyAttribute]
    public T c = a;

    [event: MyAttribute]
    [field: MyAttribute]
    [method: MyAttribute]
    event MyDelegate<T>? Event;

    [property: MyAttribute]
    [field: MyAttribute]
    public int MyProperty
    {
        [method: MyAttribute]
        [return: MyAttribute]
        get;
        [method: MyAttribute]
        [param: MyAttribute]
        [return: MyAttribute]
        set;
    }

    [property: MyAttribute]
    public int this[int i]
    {
        [method: MyAttribute]
        [return: MyAttribute]
        get => default;
        [method: MyAttribute]
        [param: MyAttribute]
        [return: MyAttribute]
        set => _ = value;
    }

    [method: MyAttribute]
    [return: MyAttribute]
    public static T? operator +([param: MyAttribute] C<T> left, [param: MyAttribute] object right) => default;
    public static void M<[typevar: MyAttribute] K, [typevar: MyAttribute] V>() { }

    [method: MyAttribute]
    ~C() { }
}