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Type.GetHashCode Method

Returns the hash code for this instance.

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

'Declaration
Public Overrides Function GetHashCode As Integer
'Usage
Dim instance As Type
Dim returnValue As Integer

returnValue = instance.GetHashCode
public int GetHashCode ()
public override function GetHashCode () : int

Return Value

An Int32 containing the hash code for this instance.

This method overrides Object.GetHashCode.

The following example displays the hash code of the System.Windows.Forms.Button class.

Imports System
Imports System.Security
Imports System.Reflection
Imports Microsoft.VisualBasic

' Compile this sample using the following command line:
' vbc type_gethashcode_getfields.vb /r:"System.Windows.Forms.dll" /r:"System.dll"

Class FieldsSample

    Public Shared Sub Main()
        Dim myType As Type = GetType(System.Net.IPAddress)
        Dim myFields As FieldInfo() = myType.GetFields((BindingFlags.Static Or BindingFlags.NonPublic))
        Console.WriteLine(ControlChars.Lf & "The IPAddress class has the following nonpublic fields: ")
        Dim myField As FieldInfo
        For Each myField In myFields
            Console.WriteLine(myField.ToString())
        Next myField
        Dim myType1 As Type = GetType(System.Net.IPAddress)
        Dim myFields1 As FieldInfo() = myType1.GetFields()
        Console.WriteLine(ControlChars.Lf & "The IPAddress class has the following public fields: ")
        Dim myField1 As FieldInfo
        For Each myField1 In myFields1
            Console.WriteLine(myField.ToString())
        Next myField1
        Try
            Console.WriteLine("The HashCode of the System.Windows.Forms.Button type is: {0}", GetType(System.Windows.Forms.Button).GetHashCode())
        Catch e As SecurityException
            Console.WriteLine("An exception occurred.")
            Console.WriteLine(("Message: " & e.Message))
        Catch e As Exception
            Console.WriteLine("An exception occurred.")
            Console.WriteLine(("Message: " & e.Message))
        End Try
    End Sub 'Main
End Class 'FieldsSample

import System.*;
import System.Security.*;
import System.Reflection.*;

class FieldsSample
{
    public static void main(String[] args)
    {
        Type myType = System.Net.IPAddress.class.ToType();
        FieldInfo myFields[] = myType.GetFields(BindingFlags.Static
            | BindingFlags.NonPublic);
        Console.WriteLine("\nThe IPAddress class has the following nonpublic"
            + " fields: ");
        for (int iCtr = 0; iCtr < myFields.length; iCtr++) {
            FieldInfo myField = myFields[iCtr];
            Console.WriteLine(myField.ToString());
        }
        Type myType1 = System.Net.IPAddress.class.ToType();
        FieldInfo myFields1[] = myType1.GetFields();
        Console.WriteLine("\nThe IPAddress class has the following"
            + " public fields: ");
        for (int iCtr = 0; iCtr < myFields1.length; iCtr++) {
            FieldInfo myField = myFields1[iCtr];
            Console.WriteLine(myField.ToString());
        }
        try {
            Console.WriteLine("The HashCode of the System.Windows.Forms.Button"
                + " type is: {0}",
                (Int32)(System.Windows.Forms.Button.class.ToType().
                GetHashCode()));
        }
        catch (SecurityException e) {
            Console.WriteLine("An exception occurred.");
            Console.WriteLine("Message: " + e.get_Message());
        }
        catch (System.Exception e) {
            Console.WriteLine("An exception occurred.");
            Console.WriteLine("Message: " + e.get_Message());
        }
    } //main
} //FieldsSample

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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