Type.GetHashCode Method

Returns the hash code for this instance.

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

public:
virtual int GetHashCode () override
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.

#using <system.dll>
#using <system.windows.forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Security;
using namespace System::Reflection;

int main()
{
   Type^ myType = System::Net::IPAddress::typeid;
   array<FieldInfo^>^myFields = myType->GetFields( static_cast<BindingFlags>(BindingFlags::Static | BindingFlags::NonPublic) );
   Console::WriteLine( "\nThe IPAddress class has the following nonpublic fields: " );
   System::Collections::IEnumerator^ myEnum = myFields->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      FieldInfo^ myField = safe_cast<FieldInfo^>(myEnum->Current);
      Console::WriteLine( myField );
   }

   Type^ myType1 = System::Net::IPAddress::typeid;
   array<FieldInfo^>^myFields1 = myType1->GetFields();
   Console::WriteLine( "\nThe IPAddress class has the following public fields: " );
   System::Collections::IEnumerator^ myEnum2 = myFields1->GetEnumerator();
   while ( myEnum2->MoveNext() )
   {
      FieldInfo^ myField = safe_cast<FieldInfo^>(myEnum2->Current);
      Console::WriteLine( myField );
   }

   try
   {
      Console::WriteLine( "The HashCode of the System::Windows::Forms::Button type is: {0}", System::Windows::Forms::Button::typeid->GetHashCode() );
   }
   catch ( SecurityException^ e ) 
   {
      Console::WriteLine( "An exception occurred." );
      Console::WriteLine( "Message: {0}", e->Message );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "An exception occurred." );
      Console::WriteLine( "Message: {0}", e->Message );
   }
}

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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