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Type.IsInstanceOfType Method

Determines whether the specified object is an instance of the current Type.

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

public virtual bool IsInstanceOfType (
	Object o
)
public boolean IsInstanceOfType (
	Object o
)
public function IsInstanceOfType (
	o : Object
) : boolean
Not applicable.

Parameters

o

The object to compare with the current Type.

Return Value

true if the current Type is in the inheritance hierarchy of the object represented by o, or if the current Type is an interface that o supports. false if neither of these conditions is the case, or if o is a null reference (Nothing in Visual Basic), or if the current Type is an open generic type (that is, ContainsGenericParameters returns true).

This method can be overridden by a derived class.

NoteNote:

A constructed type is not an instance of its generic type definition. That is, MyGenericList<int> (MyGenericList(Of Integer) in Visual Basic) is not an instance of MyGenericList<T> (MyGenericList(Of T) in Visual Basic).

The following example demonstrates the use of the IsInstanceOfType method.

using System;
public interface IMyIfc {}
public class MyClass : IMyIfc {}
public class MyDerivedClass : MyClass {}
class IsInstanceTest 
{
    public static void Main() 
    {
        Type imyifcType=typeof(IMyIfc);
        MyClass mc = new MyClass();
        Type mcType = mc.GetType();
        MyClass mdc = new MyDerivedClass();
        Type mdcType = mdc.GetType();
        int [] array  = new int [10];
        Type arrayType = typeof(Array);
        Console.WriteLine("Is int[] an instance of the Array class? {0}.", arrayType.IsInstanceOfType(array));
        Console.WriteLine("Is myclass an instance of MyClass? {0}.", mcType.IsInstanceOfType(mc));
        Console.WriteLine("Is myderivedclass an instance of MyClass? {0}.", mcType.IsInstanceOfType(mdc));
        Console.WriteLine("Is myclass an instance of IMyIfc? {0}.", imyifcType.IsInstanceOfType(mc));
        Console.WriteLine("Is myderivedclass an instance of IMyIfc? {0}.", imyifcType.IsInstanceOfType(mdc));
    }
}

import System.*;
public interface IMyIfc
{
} //IMyIfc

public class MyClass implements IMyIfc
{
} //MyClass

public class MyDerivedClass extends MyClass
{
} //MyDerivedClass

class IsInstanceTest
{
    public static void main(String[] args)
    {
        Type imyifcType = IMyIfc.class.ToType();
        MyClass mc = new MyClass();
        Type mcType = mc.GetType();
        MyClass mdc = new MyDerivedClass();
        Type mdcType = mdc.GetType();
        int array[] = new int[10];
        Type arrayType = Array.class.ToType();
        Console.WriteLine("Is int[] an instance of the Array class? {0}.",
            System.Convert.ToString(arrayType.IsInstanceOfType(array)));
        Console.WriteLine("Is myclass an instance of MyClass? {0}.", 
            System.Convert.ToString(mcType.IsInstanceOfType(mc)));
        Console.WriteLine("Is myderivedclass an instance of MyClass? {0}.",
            System.Convert.ToString(mcType.IsInstanceOfType(mdc)));
        Console.WriteLine("Is myclass an instance of IMyIfc? {0}.",
            System.Convert.ToString(imyifcType.IsInstanceOfType(mc)));
        Console.WriteLine("Is myderivedclass an instance of IMyIfc? {0}.", 
            System.Convert.ToString(imyifcType.IsInstanceOfType(mdc)));
    } //main
} //IsInstanceTest

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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