Annotate With

Context action	When suggested	Applies to
Annotate with [AttributeUsage(...)]	class derives Attribute	types
Annotate with [HandlesResourceDisposal]	non-static non-private method of disposable types, input parameter of disposable types, property or field of disposable types	methods, parameters, properties, fields
Annotate with [IgnoreSpellingAndGrammarErrors]	parameter is an input parameter	parameters
Annotate with [ItemNotNull]	nullable annotation context (C# 8.0 or higher) is not enabled and type is IEnumerable<T> (or descendant), or type is Task<T> (or any other generic task-like type), or Lazy<T> and T is a reference type	methods, parameters, properties, delegates, fields
Annotate with [InstantHandle]	type is IEnumerable<T> (but not a descendant), IAsyncEnumerable<T> (but not a descendant), or a delegate	parameters
Annotate with [LinqTunnel]	the method has at least one IEnumerable<T> (but not a descendant) parameter and the return type is also an IEnumerable<T> (but not a descendant) or method has at least one IAsyncEnumerable<T> (but not a descendant) parameter and the return type is also an IAsyncEnumerable<T> (but not a descendant)	methods
Annotate with [MustDisposeResource] or [MustDisposeResource(false)]	disposable types constructors of such types, method with disposable return type, non-input parameter of disposable types	types, constructors, methods (and replaces the [Pure] or [MustUseReturnValue] annotation, if exists), parameters
Annotate with [MustUseReturnValue] (with observable state changes)	return type is not void	methods (and replaces the [Pure] or [MustDisposeResource] annotation, if exists)
Annotate with [NonNegativeValue]	type is int, long, short, or sbyte	methods, parameters, properties, delegates, fields
Annotate with [Pure] (no observable state changes)	return type is not void or the method has out parameters and it does not have any ref parameter	methods (and replaces the [MustUseReturnValue] or [MustDisposeResource] annotation, if exists)
Annotate with [ValueRange(...)]	type is int, long, short, sbyte, uint, ulong, ushort, or byte	methods, parameters, properties, delegates, fields