MemberInfo Class
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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

NameDescription
System_CAPS_protmethodMemberInfo()

Initializes a new instance of the MemberInfo class.

NameDescription
System_CAPS_pubpropertyCustomAttributes

Gets a collection that contains this member's custom attributes.

System_CAPS_pubpropertyDeclaringType

Gets the class that declares this member.

System_CAPS_pubpropertyMemberType

When overridden in a derived class, gets a MemberTypes value indicating the type of the member — method, constructor, event, and so on.

System_CAPS_pubpropertyMetadataToken

Gets a value that identifies a metadata element.

System_CAPS_pubpropertyModule

Gets the module in which the type that declares the member represented by the current MemberInfo is defined.

System_CAPS_pubpropertyName

Gets the name of the current member.

System_CAPS_pubpropertyReflectedType

Gets the class object that was used to obtain this instance of MemberInfo.

NameDescription
System_CAPS_pubmethodEquals(Object)

Returns a value that indicates whether this instance is equal to a specified object.(Overrides Object.Equals(Object).)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetCustomAttributes(Boolean)

When overridden in a derived class, returns an array of all custom attributes applied to this member.

System_CAPS_pubmethodGetCustomAttributes(Type, Boolean)

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

System_CAPS_pubmethodGetCustomAttributesData()

Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target member.

System_CAPS_pubmethodGetHashCode()

Returns the hash code for this instance.(Overrides Object.GetHashCode().)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsDefined(Type, Boolean)

When 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.

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_puboperatorSystem_CAPS_staticEquality(MemberInfo, MemberInfo)

Indicates whether two MemberInfo objects are equal.

System_CAPS_puboperatorSystem_CAPS_staticInequality(MemberInfo, MemberInfo)

Indicates whether two MemberInfo objects are not equal.

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethod_MemberInfo.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.

System_CAPS_pubinterfaceSystem_CAPS_privmethod_MemberInfo.GetType()

Gets a Type object representing the MemberInfo class.

System_CAPS_pubinterfaceSystem_CAPS_privmethod_MemberInfo.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can then be used to get the type information for an interface.

System_CAPS_pubinterfaceSystem_CAPS_privmethod_MemberInfo.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

System_CAPS_pubinterfaceSystem_CAPS_privmethod_MemberInfo.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

NameDescription
System_CAPS_pubmethodGetCustomAttribute(Type)

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethodGetCustomAttribute(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.)

System_CAPS_pubmethodGetCustomAttribute<T>()

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethodGetCustomAttribute<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.)

System_CAPS_pubmethodGetCustomAttributes()

Overloaded. Retrieves a collection of custom attributes that are applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethodGetCustomAttributes(Type)

Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethodGetCustomAttributes<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.)

System_CAPS_pubmethodIsDefined(Type)

Overloaded. Indicates whether custom attributes of a specified type are applied to a specified member.(Defined by CustomAttributeExtensions.)

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

SecurityAction.InheritanceDemand

for full trust for inheritors. This class cannot be inherited by partially trusted code.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

This type is thread safe.

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