Home Library Learn Downloads Support Community
Sign in | United States - English | |
This topic has not yet been rated - Rate this topic

DefaultDependencyAttribute Class

.NET Framework 4

Provides a hint to the common language runtime (CLR) indicating how likely a dependency is to be loaded. This class is used in a dependent assembly to indicate what hint should be used when the parent does not specify the DependencyAttribute attribute. This class cannot be inherited.

System.Object
  System.Attribute
    System.Runtime.CompilerServices.DefaultDependencyAttribute

Namespace:  System.Runtime.CompilerServices
Assembly:  mscorlib (in mscorlib.dll)
C#
C++
F#
VB
Copy 
[SerializableAttribute]
[AttributeUsageAttribute(AttributeTargets.Assembly)]
public sealed class DefaultDependencyAttribute : Attribute

The DefaultDependencyAttribute type exposes the following members.

  Name Description
Public method DefaultDependencyAttribute Initializes a new instance of the DefaultDependencyAttribute class with the specified LoadHint binding.
Top
  Name Description
Public property LoadHint Gets the LoadHint value that indicates when an assembly loads a dependency.
Public property TypeId When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
Top
  Name Description
Public method Equals Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Returns the hash code for this instance. (Inherited from Attribute.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Public method IsDefaultAttribute When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public method Match When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)
Top
  Name Description
Explicit interface implemetation Private method _Attribute.GetIDsOfNames Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetation Private method _Attribute.GetTypeInfo Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetation Private method _Attribute.GetTypeInfoCount Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetation Private method _Attribute.Invoke Provides access to properties and methods exposed by an object. (Inherited from Attribute.)
Top

This attribute is used by the Ngen.exe (Native Image Generator) to generate native assembly images.

Apply the DefaultDependencyAttribute attribute to a dependent assembly to determine the preferred default binding.

A dependency that is likely to be loaded (Always) will cause Ngen.exe to bind to that dependency. Using this hint allows Ngen.exe to generate code that will result in a reduced working set and improved throughput but at the cost of always loading the dependency when the parent assembly is loaded.

When you apply the DependencyAttribute attribute to an assembly with a value of Default, the native image generation service consults the dependent assembly for its preferred default binding, which is specified by the DefaultDependencyAttribute attribute.

The following code example demonstrates how to apply the DefaultDependencyAttribute attribute to an assembly to specify that the dependency is likely to be loaded.

C#
VB
Copy 

using System;
using System.Runtime.CompilerServices;

[assembly: DefaultDependencyAttribute(LoadHint.Always)]
class Program
{

    static void Main(string[] args)
    {

        Console.WriteLine("The DefaultDependencyAttribute attribute was applied.");

    }
}

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Did you find this helpful?
(1500 characters remaining)
Community Content Add
Annotations FAQ