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DependencyAttribute Class

Indicates when a dependency is to be loaded by the referring assembly. This class cannot be inherited.

System.Object
  System.Attribute
    System.Runtime.CompilerServices.DependencyAttribute

Namespace:  System.Runtime.CompilerServices
Assembly:  mscorlib (in mscorlib.dll)

[SerializableAttribute]
[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = true)]
public sealed class DependencyAttribute : Attribute

The DependencyAttribute type exposes the following members.

  NameDescription
Public methodDependencyAttributeInitializes a new instance of the DependencyAttribute class with the specified LoadHint value.
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  NameDescription
Public propertyDependentAssemblyGets the value of the dependent assembly.
Public propertyLoadHintGets the LoadHint value that indicates when an assembly is to load a dependency.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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This attribute is used by the Ngen.exe (Native Image Generator) to generate native assembly images.

Apply the DependencyAttribute attribute to a dependent assembly with a value of the LoadHint enumeration to specify when a referring assembly is to load a dependency.

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.

The following example specifies that the native image generation service always binds to AssemblyA and sometimes binds to AssemblyB.


using System;
using System.Runtime.CompilerServices;

[assembly: DependencyAttribute("AssemblyA", LoadHint.Always)]
[assembly: DependencyAttribute("AssemblyB", LoadHint.Sometimes)]

class Program
{

    static void Main(string[] args)
    {

        Console.WriteLine("The DependencyAttribute 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.

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