[AttributeUsageAttribute(AttributeTargets.Delegate|AttributeTargets.Field|AttributeTargets.Method|AttributeTargets.Parameter|AttributeTargets.Property)]
public sealed class CanBeNullAttribute : Attribute<AttributeUsageAttribute(AttributeTargets.Delegate Or AttributeTargets.Field Or AttributeTargets.Method Or AttributeTargets.Parameter Or AttributeTargets.Property)>
Public NotInheritable Class CanBeNullAttribute
Inherits Attribute[AttributeUsageAttribute(AttributeTargets::Delegate|AttributeTargets::Field|AttributeTargets::Method|AttributeTargets::Parameter|AttributeTargets::Property)]
public ref class CanBeNullAttribute sealed : public Attribute[<SealedAttribute>]
[<AttributeUsageAttribute(AttributeTargets.Delegate|AttributeTargets.Field|AttributeTargets.Method|AttributeTargets.Parameter|AttributeTargets.Property)>]
type CanBeNullAttribute =
class
inherit Attribute
end[CanBeNull]
public object Test()
{
return null;
}
public void UseTest()
{
var p = Test();
var s = p.ToString(); // Warning: Possible 'System.NullReferenceException'
}| CanBeNullAttribute | Инициализирует новый экземпляр класса CanBeNullAttribute |
| TypeId | When implemented in a derived class, gets a unique identifier for this Attribute. (Унаследован от Attribute) |
| Equals | Returns a value that indicates whether this instance is equal to a specified object. (Унаследован от Attribute) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Унаследован от Object) |
| GetHashCode | Returns the hash code for this instance. (Унаследован от Attribute) |
| GetType | Gets the Type of the current instance. (Унаследован от Object) |
| IsDefaultAttribute | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Унаследован от Attribute) |
| Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Унаследован от Attribute) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Унаследован от Object) |
| ToString | Returns a string that represents the current object. (Унаследован от Object) |