This documentation is archived and is not being maintained.

MemberAttributes Enumeration

Defines member attribute identifiers for class members.

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

public enum MemberAttributes

Member nameDescription
AbstractAn abstract member.
FinalA member that cannot be overridden in a derived class.
StaticA static member. In Visual Basic, this is equivalent to the Shared keyword.
OverrideA member that overrides a base class member.
ConstA constant member.
NewA new member.
OverloadedAn overloaded member. Some languages, such as Visual Basic, require overloaded members to be explicitly indicated.
AssemblyA member that is accessible to any class within the same assembly.
FamilyAndAssemblyA member that is accessible within its class, and derived classes in the same assembly.
FamilyA member that is accessible within the family of its class and derived classes.
FamilyOrAssemblyA member that is accessible within its class, its derived classes in any assembly, and any class in the same assembly.
PrivateA private member.
PublicA public member.
AccessMaskAn access mask.
ScopeMaskA scope mask.
VTableMaskA VTable mask.

The identifiers defined in the MemberAttributes enumeration can be used to indicate the scope and access attributes of a class member.


There is no Virtual member attribute. A member is declared virtual by setting its member access to Public (property1.Attributes = MemberAttributes.Public) without specifying it as Final. The absence of the Final flag makes a member virtual in C# (public virtual), overrideable in Visual Basic (Public Overrideable). To avoid declaring the member as virtual or overrideable, set both the Public and Final flags in the Attributes property. See the Attributes property for more information on setting member attributes.


The pattern for setting the access flags (flags containing the terms Public, Private, Assembly, or Family) is to mask out all access flags using the AccessMask mask and then set the desired access flag. For example, the code statement to identify a constructor (named constructor1) as public is constructor1.Attributes = (constructor1.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;. Setting the Attributes property directly to an access flag (for example, constructor1.Attributes = MemberAttributes.Public;) erases all other flags that might be set. This pattern should also be used for setting the scope flags (Abstract, Final, Static, Override or Const) using the ScopeMask mask.

The following example code demonstrates use of a CodeMemberProperty to define a string property with get and set accessors.

// Declares a property of type String named StringProperty.
CodeMemberProperty property1 = new CodeMemberProperty();
property1.Name = "StringProperty";
property1.Type = new CodeTypeReference("System.String");
property1.Attributes = MemberAttributes.Public;
property1.GetStatements.Add( new CodeMethodReturnStatement( new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), "testStringField") ) );
property1.SetStatements.Add( new CodeAssignStatement( new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), "testStringField"), new CodePropertySetValueReferenceExpression()));

// A C# code generator produces the following source code for the preceeding example code: 

//       public virtual string StringProperty  
//       { 
//              get  
//            { 
//                return this.testStringField; 
//            } 
//            set  
//            { 
//                this.testStringField = value; 
//            } 
//       }            

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

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