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Type.IsArrayImpl Method

When overridden in a derived class, implements the IsArray property and determines whether the Type is an array.

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

protected abstract bool IsArrayImpl()

Return Value

Type: System.Boolean
true if the Type is an array; otherwise, false.

An instance of the Array class must return false because it is an object, not an array.

The following example overrides the IsArrayImpl method in the MyTypeDelegator class, checks if a variable is an array, and displays the result.

using System;
using System.Reflection;
public class MyTypeDelegator : TypeDelegator
    public string myElementType = null;
    public Type myType;
    public MyTypeDelegator(Type myType) : base(myType)
        this.myType = myType;
    // Override IsArrayImpl().
    protected override bool IsArrayImpl()
        // Determine whether the type is an array.
            myElementType = "array";
            return true;
        // Return false if the type is not an array.
        return false;  
public class Type_IsArrayImpl
    public static void Main()
            int myInt = 0 ; 
            // Create an instance of an array element.
            int[] myArray = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            Console.WriteLine("\nDetermine whether the variable is an array.\n");
            // Determine whether myType is an array type.  
            if( myType.IsArray)
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType);
                Console.WriteLine("myArray is not an array.");
            myType = new MyTypeDelegator(myInt.GetType());

            // Determine whether myType is an array type. 
            if( myType.IsArray)
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType);
                Console.WriteLine("myInt is not an array.");
        catch( Exception e )
            Console.WriteLine("Exception: {0}", e.Message );

.NET Framework

Supported in: 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

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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