MemberInfo Class

Obtains information about the attributes of a member and provides access to member metadata.

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

[SerializableAttribute]
[ClassInterfaceAttribute(ClassInterfaceType.None)]
[ComVisibleAttribute(true)]
[PermissionSetAttribute(SecurityAction.InheritanceDemand, Name = "FullTrust")]
public abstract class MemberInfo : ICustomAttributeProvider, 
	_MemberInfo

The MemberInfo type exposes the following members.

  NameDescription
Protected methodSupported by the XNA FrameworkMemberInfoInitializes a new instance of the MemberInfo class.
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  NameDescription
Public propertySupported in .NET for Windows Store appsCustomAttributesGets a collection that contains this member's custom attributes.
Public propertySupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsDeclaringTypeGets the class that declares this member.
Public propertySupported by the XNA FrameworkMemberTypeWhen overridden in a derived class, gets a MemberTypes value indicating the type of the member — method, constructor, event, and so on.
Public propertyMetadataTokenGets a value that identifies a metadata element.
Public propertySupported in .NET for Windows Store appsModuleGets the module in which the type that declares the member represented by the current MemberInfo is defined.
Public propertySupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsNameGets the name of the current member.
Public propertySupported by the XNA FrameworkSupported by Portable Class LibraryReflectedTypeGets the class object that was used to obtain this instance of MemberInfo.
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  NameDescription
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryEqualsReturns a value that indicates whether this instance is equal to a specified object. (Overrides Object.Equals(Object).)

In XNA Framework 3.0, this member is inherited from Object.Equals(Object).


In Portable Class Library Portable Class Library, this member is inherited from Object.Equals(Object).
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryGetCustomAttributes(Boolean)When overridden in a derived class, returns an array of all custom attributes applied to this member.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryGetCustomAttributes(Type, Boolean)When overridden in a derived class, returns an array of custom attributes applied to this member and identified by Type.
Public methodGetCustomAttributesDataReturns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target member.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryGetHashCodeReturns the hash code for this instance. (Overrides Object.GetHashCode().)

In XNA Framework 3.0, this member is inherited from Object.GetHashCode().


In Portable Class Library Portable Class Library, this member is inherited from Object.GetHashCode().
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryIsDefinedWhen overridden in a derived class, indicates whether one or more attributes of the specified type or of its derived types is applied to this member.
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public operatorStatic memberEqualityIndicates whether two MemberInfo objects are equal.
Public operatorStatic memberInequalityIndicates whether two MemberInfo objects are not equal.
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  NameDescription
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttribute(Type)Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttribute(Type, Boolean)Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member, and optionally inspects the ancestors of that member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttribute<T>()Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttribute<T>(Boolean)Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member, and optionally inspects the ancestors of that member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes()Overloaded. Retrieves a collection of custom attributes that are applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes(Boolean)Overloaded. Retrieves a collection of custom attributes that are applied to a specified member, and optionally inspects the ancestors of that member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes(Type)Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes(Type, Boolean)Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member, and optionally inspects the ancestors of that member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes<T>()Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsGetCustomAttributes<T>(Boolean)Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member, and optionally inspects the ancestors of that member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsIsDefined(Type)Overloaded. Indicates whether custom attributes of a specified type are applied to a specified member. (Defined by CustomAttributeExtensions.)
Public Extension MethodSupported in .NET for Windows Store appsIsDefined(Type, Boolean)Overloaded. Indicates whether custom attributes of a specified type are applied to a specified member, and, optionally, applied to its ancestors. (Defined by CustomAttributeExtensions.)
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  NameDescription
Explicit interface implemetationPrivate method_MemberInfo.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers.
Explicit interface implemetationPrivate method_MemberInfo.GetTypeGets a Type object representing the MemberInfo class.
Explicit interface implemetationPrivate method_MemberInfo.GetTypeInfoRetrieves the type information for an object, which can then be used to get the type information for an interface.
Explicit interface implemetationPrivate method_MemberInfo.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1).
Explicit interface implemetationPrivate method_MemberInfo.InvokeProvides access to properties and methods exposed by an object.
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The MemberInfo class is the abstract base class for classes used to obtain information about all members of a class (constructors, events, fields, methods, and properties).

This class introduces the basic functionality that all members provide.

Notes to Inheritors

When you inherit from MemberInfo you must override the following members: GetCustomAttributes and IsDefined.

This example shows how to use various reflection classes to analyze the metadata contained in an assembly.

using System;
using System.Reflection;

class Module1
{
    public static void Main()
    {
        // This variable holds the amount of indenting that  
        // should be used when displaying each line of information.
        Int32 indent = 0;
        // Display information about the EXE assembly.
        Assembly a = typeof(Module1).Assembly;
        Display(indent, "Assembly identity={0}", a.FullName);
        Display(indent+1, "Codebase={0}", a.CodeBase);

        // Display the set of assemblies our assemblies reference.

        Display(indent, "Referenced assemblies:");
        foreach (AssemblyName an in a.GetReferencedAssemblies() )
        {
             Display(indent + 1, "Name={0}, Version={1}, Culture={2}, PublicKey token={3}", an.Name, an.Version, an.CultureInfo.Name, (BitConverter.ToString (an.GetPublicKeyToken())));
        }
        Display(indent, "");

        // Display information about each assembly loading into this AppDomain. 
        foreach (Assembly b in AppDomain.CurrentDomain.GetAssemblies())
        {
            Display(indent, "Assembly: {0}", b);

            // Display information about each module of this assembly. 
            foreach ( Module m in b.GetModules(true) )
            {
                Display(indent+1, "Module: {0}", m.Name);
            }

            // Display information about each type exported from this assembly.

            indent += 1;
            foreach ( Type t in b.GetExportedTypes() )
            {
                Display(0, "");
                Display(indent, "Type: {0}", t);

                // For each type, show its members & their custom attributes.

                indent += 1;
                foreach (MemberInfo mi in t.GetMembers() )
                {
                    Display(indent, "Member: {0}", mi.Name);
                    DisplayAttributes(indent, mi);

                    // If the member is a method, display information about its parameters. 

                    if (mi.MemberType==MemberTypes.Method)
                    {
                        foreach ( ParameterInfo pi in ((MethodInfo) mi).GetParameters() )
                        {
                            Display(indent+1, "Parameter: Type={0}, Name={1}", pi.ParameterType, pi.Name);
                        }
                    }

                    // If the member is a property, display information about the property's accessor methods. 
                    if (mi.MemberType==MemberTypes.Property)
                    {
                        foreach ( MethodInfo am in ((PropertyInfo) mi).GetAccessors() )
                        {
                            Display(indent+1, "Accessor method: {0}", am);
                        }
                    }
                }
                indent -= 1;
            }
            indent -= 1;
        }
    }

    // Displays the custom attributes applied to the specified member. 
    public static void DisplayAttributes(Int32 indent, MemberInfo mi)
    {
        // Get the set of custom attributes; if none exist, just return. 
        object[] attrs = mi.GetCustomAttributes(false);
        if (attrs.Length==0) {return;}

        // Display the custom attributes applied to this member.
        Display(indent+1, "Attributes:");
        foreach ( object o in attrs )
        {
            Display(indent+2, "{0}", o.ToString());
        }
    }

    // Display a formatted string indented by the specified amount. 
    public static void Display(Int32 indent, string format, params object[] param) 

    {
        Console.Write(new string(' ', indent*2));
        Console.WriteLine(format, param);
    }
}

//The output shown below is abbreviated. 
// 
//Assembly identity=ReflectionCS, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null 
//  Codebase=file:///C:/Documents and Settings/test/My Documents/Visual Studio 2005/Projects/Reflection/Reflection/obj/Debug/Reflection.exe 
//Referenced assemblies: 
//  Name=mscorlib, Version=2.0.0.0, Culture=, PublicKey token=B7-7A-5C-56-19-34-E0-89 
// 
//Assembly: mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
//  Module: mscorlib.dll 
// 
//  Type: System.Object 
//    Member: GetType 
//    Member: ToString 
//    Member: Equals 
//      Parameter: Type=System.Object, Name=obj 
//    Member: Equals 
//      Parameter: Type=System.Object, Name=objA 
//      Parameter: Type=System.Object, Name=objB 
//    Member: ReferenceEquals 
//      Attributes: 
//        System.Runtime.ConstrainedExecution.ReliabilityContractAttribute 
//      Parameter: Type=System.Object, Name=objA 
//      Parameter: Type=System.Object, Name=objB 
//    Member: GetHashCode 
//    Member: .ctor 
//      Attributes: 
//        System.Runtime.ConstrainedExecution.ReliabilityContractAttribute 
// 
//  Type: System.ICloneable 
//    Member: Clone 
// 
//  Type: System.Collections.IEnumerable 
//    Member: GetEnumerator 
//      Attributes: 
//        System.Runtime.InteropServices.DispIdAttribute 
// 
//  Type: System.Collections.ICollection 
//    Member: CopyTo 
//      Parameter: Type=System.Array, Name=array 
//      Parameter: Type=System.Int32, Name=index 
//    Member: get_Count 
//    Member: get_SyncRoot 
//    Member: get_IsSynchronized 
//    Member: Count 
//      Accessor method: Int32 get_Count() 
//    Member: SyncRoot 
//      Accessor method: System.Object get_SyncRoot() 
//    Member: IsSynchronized 
//      Accessor method: Boolean get_IsSynchronized() 
// 
//  Type: System.Collections.IList 
//    Member: get_Item 
//      Parameter: Type=System.Int32, Name=index 
//    Member: set_Item 
//      Parameter: Type=System.Int32, Name=index 
//      Parameter: Type=System.Object, Name=value 
//    Member: Add 
//      Parameter: Type=System.Object, Name=value 
//    Member: Contains 
//      Parameter: Type=System.Object, Name=value 
//    Member: Clear 
//    Member: get_IsReadOnly 
//    Member: get_IsFixedSize 
//    Member: IndexOf 
//      Parameter: Type=System.Object, Name=value 
//    Member: Insert 
//      Parameter: Type=System.Int32, Name=index 
//      Parameter: Type=System.Object, Name=value 
//    Member: Remove 
//      Parameter: Type=System.Object, Name=value 
//    Member: RemoveAt 
//      Parameter: Type=System.Int32, Name=index 
//    Member: Item 
//      Accessor method: System.Object get_Item(Int32) 
//      Accessor method: Void set_Item(Int32, System.Object) 
//    Member: IsReadOnly 
//      Accessor method: Boolean get_IsReadOnly() 
//    Member: IsFixedSize 
//      Accessor method: Boolean get_IsFixedSize() 
// 
//  Type: System.Array 
//    Member: IndexOf 
//      Parameter: Type=T[], Name=array 
//      Parameter: Type=T, Name=value 
//    Member: AsReadOnly 
//      Parameter: Type=T[], Name=array 
//    Member: Resize 
//      Attributes: 
//        System.Runtime.ConstrainedExecution.ReliabilityContractAttribute 
//      Parameter: Type=T[]&, Name=array 
//      Parameter: Type=System.Int32, Name=newSize 
//    Member: BinarySearch 
//      Attributes: 
//        System.Runtime.ConstrainedExecution.ReliabilityContractAttribute 
//      Parameter: Type=T[], Name=array 
//      Parameter: Type=T, Name=value 
//    Member: BinarySearch 
//      Attributes: 
//        System.Runtime.ConstrainedExecution.ReliabilityContractAttribute 
//      Parameter: Type=T[], Name=array 
//      Parameter: Type=T, Name=value 
//      Parameter: Type=System.Collections.Generic.IComparer`1[T], Name=comparer

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

This type is thread safe.

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