MemberInfo.GetCustomAttributes Method (Type, Boolean)


When overridden in a derived class, returns an array of custom attributes applied to this member and identified by Type.

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

Public MustOverride Function GetCustomAttributes (
	attributeType As Type,
	inherit As Boolean
) As Object()


Type: System.Type

The type of attribute to search for. Only attributes that are assignable to this type are returned.

Type: System.Boolean

true to search this member's inheritance chain to find the attributes; otherwise, false. This parameter is ignored for properties and events; see Remarks.

Return Value

Type: System.Object()

An array of custom attributes applied to this member, or an array with zero elements if no attributes assignable to attributeType have been applied.

Exception Condition

A custom attribute type cannot be loaded.


If attributeType is null.


This member belongs to a type that is loaded into the reflection-only context. See How to: Load Assemblies into the Reflection-Only Context.

This method ignores the inherit parameter for properties and events. To search the inheritance chain for attributes on properties and events, use the appropriate overloads of the Attribute.GetCustomAttributes method.


In the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if the attributes are stored in the new metadata format. Assemblies compiled with version 2.0 use this 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 example defines a class named BaseClass that has two non-inherited members: a thread static field named total and a non-CLS-compliant method named MethodA. A class named DerivedClass inherits from BaseClass and overrides its MethodA method. Note that no attributes are applied to the members of DerivedClass. The example iterates the members of DerivedClass to determine whether the CLSCompliantAttribute or ThreadStaticAttribute attribute as been applied to them. Because inherit is true, the method searches the inheritance hierarchy of DerivedClass for the specified attribute. As the output from the example shows, the total field is decorated with the ThreadStaticAttribute attribute, and the MethodA method is decorated with the CLSCompliantAttribute attribute.

Public Class BaseClass
   <ThreadStatic> Public total As Integer

   <CLSCompliant(False)> Public Overridable Function MethodA() As UInt32
      Return CUInt(100)
   End Function
End Class

Public Class DerivedClass : Inherits BaseClass
   Public Overrides Function MethodA() As UInt32
      total += 1
      Return 200
   End Function
End Class

Module Example
   Public Sub Main()
      Dim t As Type = GetType(DerivedClass)
      Console.WriteLine("Members of {0}:", t.FullName)
      For Each m In t.GetMembers()
         Dim hasAttribute As Boolean = False
         Console.Write("   {0}: ", m.Name)
         If m.GetCustomAttributes(GetType(CLSCompliantAttribute), True).Length > 0 Then
            hasAttribute = True
         End If
         If m.GetCustomAttributes(GetType(ThreadStaticAttribute), True).Length > 0 Then
            hasAttribute = True
         End If
         If Not hasAttribute Then
            Console.Write("No attributes")
         End If
   End Sub
End Module
' The example displays the following output:
'       Members of DerivedClass:
'          MethodA: CLSCompliant
'          ToString: No attributes
'          Equals: No attributes
'          GetHashCode: No attributes
'          GetType: No attributes
'          .ctor: No attributes
'          total: ThreadStatic

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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