Fast follow to #44513

docs/csharp/language-reference/attributes/pseudo-attributes.md

@@ -1,6 +1,6 @@
 ---
 title: "Attributes interpreted by the compiler: Pseudo-attributes"
-ms.date: 01/2/2025
+ms.date: 01/28/2025
 description: "Learn about attributes you can add to code that are written to IL as modifiers. These custom attributes aren't emitted as attributes in the compiled output."
 ---
 # Custom attributes that generate flags or options in the Intermediate Language (IL) output
@@ -16,7 +16,6 @@ You add these attributes to your code for the compiler to emit a specified Inter
 | <xref:System.Runtime.CompilerServices.MethodImplAttribute?displayProperty=fullName>  | `flag`          | Constructor arguments specify specific named flags such as `aggressiveinlining` or `forwardref`. These flags also specify the `native`, `managed`, or `optil` modifiers for the <xref:System.Runtime.CompilerServices.MethodCodeType?displayProperty=fullName> field. |
 | <xref:System.NonSerializedAttribute?displayProperty=fullName>                        | `notserialized` |           |
 | <xref:System.Runtime.InteropServices.OptionalAttribute?displayProperty=fullName>     | `[opt]`         |           |
-| <xref:System.Runtime.InteropServices.OutAttribute?displayProperty=fullName>          | `[out]`         |           |
 | <xref:System.Runtime.InteropServices.PreserveSigAttribute?displayProperty=fullName>  | `preservesig`   |           |
 | <xref:System.SerializableAttribute?displayProperty=fullName>                         | `serializable`  |           |
 | <xref:System.Runtime.InteropServices.StructLayoutAttribute?displayProperty=fullName> | `auto`, `sequential`, or `explicit` | Layout options can be set using the parameters. |
@@ -28,10 +27,11 @@ Some of these custom attributes are applied using other C# syntax rather than ad
 |--------------------------------------------------------------------------------------------------|----------|
 | <xref:System.Runtime.InteropServices.DefaultParameterValueAttribute?displayProperty=fullName>    | Specifies the default value for the parameter. Use the [default parameter syntax](../../methods.md#optional-parameters-and-arguments). |
 | <xref:System.Runtime.InteropServices.InAttribute?displayProperty=fullName>                       | Specifies the IL `[in]` modifier. Use the [`in`](../keywords/method-parameters.md#in-parameter-modifier) or [`ref readonly`](../keywords/method-parameters.md#ref-readonly-modifier). |
+| <xref:System.Runtime.InteropServices.OutAttribute?displayProperty=fullName>                       | Specifies the IL`[out] modifier. Use the [`out`](../keywords/method-parameters.md#out-parameter-modifier). |
 | <xref:System.Runtime.CompilerServices.SpecialNameAttribute?displayProperty=fullName>             | Specifies the IL `specialname` modifier. The compiler automatically adds this modifier for methods that require it. |
-| <xref:System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute?displayProperty=nameWithType> | This attribute is required for the `delegate*` feature. The compiler adds it to any [`delegate*`](../unsafe-code.md#function-pointers) that requires its use. |
+| <xref:System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute?displayProperty=nameWithType> | This attribute is required for the `delegate*` feature. The compiler adds it to any [`delegate*`](../unsafe-code.md#function-pointers) that requires its use. However, you must add this attribute to any method declaration when that method is assigned to a function pointer. |
 
-The following custom attributes are generally disallowed in C# source. They're listed here to aid library authors who use reflection, and to ensure you don't create custom attributes with the same name.
+The following attributes are generally disallowed in C# source. They're listed here to aid library authors who use reflection, and to ensure you don't create custom attributes with the same fully qualified name.
 
 | Attribute                                                                                        | Comments  |
 |--------------------------------------------------------------------------------------------------|---------|
@@ -52,4 +52,4 @@ The following custom attributes are generally disallowed in C# source. They're l
 | <xref:System.Runtime.CompilerServices.RequiredMemberAttribute?displayProperty=fullName>          | This attribute indicates that the `required` modifier was placed on a member declaration. It's the encoding of the [required members](../keywords/required.md) language feature. |
 | <xref:System.Runtime.CompilerServices.TupleElementNamesAttribute?displayProperty=fullName>       | This attribute encodes tuple element names used in signatures. |
 
-In addition, the compiler can generate a declaration for other attributes used internally. The compiler generates these in the <xref:System.Runtime.CompilerServices> namespace for its own use. Some aren't in the .NET Runtime libraries. Instead, the compiler synthesizes a definition for an `internal` type declaration in any assembly where the attribute is needed.
+In addition, the compiler can generate a declaration for other attributes used internally. The compiler generates these attributes in the <xref:System.Runtime.CompilerServices> namespace for its own use. Some aren't in the .NET Runtime libraries. Instead, the compiler synthesizes a definition for an `internal` type declaration in any assembly where the attribute is needed.