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Attribute::GetCustomAttributes Method (Assembly, Type)

Retrieves an array of the custom attributes applied to an assembly. Parameters specify the assembly, and the type of the custom attribute to search for.

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

public:
static array<Attribute^>^ GetCustomAttributes(
	Assembly^ element, 
	Type^ attributeType
)

Parameters

element
Type: System.Reflection::Assembly
An object derived from the Assembly class that describes a reusable collection of modules.
attributeType
Type: System::Type
The type, or a base type, of the custom attribute to search for.

Return Value

Type: array<System::Attribute>
An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

ExceptionCondition
ArgumentNullException

element or attributeType is nullptr.

ArgumentException

attributeType is not derived from Attribute.

NoteNote

Starting with the .NET Framework version 2.0, this method returns security attributes if the attributes are stored in the new metadata format. Assemblies compiled with version 2.0 or later use the new format. Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. See Emitting Declarative Security Attributes.

The following code example demonstrates the use of GetCustomAttributes, taking an Assembly as a parameter.


#using <System.dll>

using namespace System;
using namespace System::Reflection;

[assembly:AssemblyTitle("CustAttrs1CS")];
[assembly:AssemblyDescription("GetCustomAttributes() Demo")];
[assembly:AssemblyCompany("Microsoft")];
namespace CustAttrs1CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {
         Type^ clsType = DemoClass::typeid;

         // Get the Assembly type to access its metadata.
         Assembly^ assy = clsType->Assembly;

         // Iterate through the attributes for the assembly.
         System::Collections::IEnumerator^ myEnum = Attribute::GetCustomAttributes( assy )->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            Attribute^ attr = safe_cast<Attribute^>(myEnum->Current);

            // Check for the AssemblyTitle attribute.
            if ( attr->GetType() == AssemblyTitleAttribute::typeid )
                        Console::WriteLine( "Assembly title is \"{0}\".", (dynamic_cast<AssemblyTitleAttribute^>(attr))->Title );
            // Check for the AssemblyDescription attribute.
            else

            // Check for the AssemblyDescription attribute.
            if ( attr->GetType() == AssemblyDescriptionAttribute::typeid )
                        Console::WriteLine( "Assembly description is \"{0}\".", (dynamic_cast<AssemblyDescriptionAttribute^>(attr))->Description );
            // Check for the AssemblyCompany attribute.
            else

            // Check for the AssemblyCompany attribute.
            if ( attr->GetType() == AssemblyCompanyAttribute::typeid )
                        Console::WriteLine( "Assembly company is {0}.", (dynamic_cast<AssemblyCompanyAttribute^>(attr))->Company );
         }
      }
   };
}


/*
 * Output:
 * Assembly company is Microsoft.
 * Assembly description is "GetCustomAttributes() Demo".
 * Assembly title is "CustAttrs1CS".
 */


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

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.

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