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AppDomain.GetData Method

Gets the value stored in the current application domain for the specified name.

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

public Object GetData(
	string name


Type: System.String
The name of a predefined application domain property, or the name of an application domain property you have defined.

Return Value

Type: System.Object
The value of the name property, or null if the property does not exist.




name is null.


The operation is attempted on an unloaded application domain.

Use this method to retrieve the value of an entry in an internal cache of name-data pairs that describe properties of this instance of AppDomain.

The cache automatically contains predefined system entries that are inserted when the application domain is created. You can inspect their values with the GetData method, or the equivalent AppDomainSetup properties.

You can insert or modify your own user defined name-data pairs with the SetData method and inspect their values with the GetData method.

The following table describes the name of each predefined system entry and its corresponding AppDomainSetup property.

Value of 'name'











(no property)













(application specific)



(no property)


"APP_LAUNCH_URL" represents the URL originally requested by the user, before any redirection. It is available only when the application has been launched with a browser such as Internet Explorer. Not all browsers provide this value.

The following code example creates a new application domain, sets a system-provided value for the domain, and adds a new value pair for the domain. The example then demonstrates how to use the GetData method to retrieve the data from these value pairs and display them to the console.

using System;
using System.Reflection;

class ADGetData 
    public static void Main() 
        // appdomain setup information
        AppDomain currentDomain = AppDomain.CurrentDomain;

        //Create a new value pair for the appdomain
        currentDomain.SetData("ADVALUE", "Example value");

        //get the value specified in the setdata method
        Console.WriteLine("ADVALUE is: " + currentDomain.GetData("ADVALUE"));

        //get a system value specified at appdomainsetup
        Console.WriteLine("System value for loader optimization: {0}",

/* This code example produces the following output:

ADVALUE is: Example value
System value for loader optimization: NotSpecified

.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

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.