CLR hosted (bottom) hosted host

The way in which you manage the CLR through managed code, called a managed host. It's easy to implement a hosting host as long as you implement the System.appdomainmanager class. The definition of the AppDomainManager class is shown in code listing 1-1.

Code Listing 1-1 AppDomainManager class definition

[ComVisibleAttribute (True)]

[SecurityPermissionAttribute (SecurityAction.LinkDemand, Flags = securitypermissionflag.infrastructure)]

[SecurityPermissionAttribute (SecurityAction.InheritanceDemand, Flags = securitypermissionflag.infrastructure)]

Public Classappdomainmanager:marshalbyrefobject

To implement your own hosting host, you need to implement a subclass of the AppDomainManager class, overriding the virtual methods. Code Listing 1-2 customizes the Xhappdomainmanager class to implement a simple hosting host.

Code Listing 1-2 Customizing the Xhappdomainmanager class

Namespace managed Host

{

[GuidAttribute ("f4d15099-3407-4a7e-a607-dea440cf3891")]

[SecurityPermissionAttribute (SecurityAction.LinkDemand,

Flags = securitypermissionflag.infrastructure)]

[SecurityPermissionAttribute (SecurityAction.InheritanceDemand, Flags = securitypermissionflag.infrastructure)]

Class Xhappdomainmanager:appdomainmanager

{

Private Hostsecuritymanagerxhhostsecuritymanager = null;

public override void Initializenewdomain (Appdomainsetupappdomaininfo)

{

Console.WriteLine ("XH AppDomain Manager");

Xhhostsecuritymanager = AppDomain.CurrentDomain.CreateInstanceAndUnwrap (

"Xhsecuritymanager, version=1.0.0.3, culture=neutral," +

"publickeytoken=5659fc598c2a503e",

The managed host. Xhhostsecuritymanager ") as Hostsecuritymanager;

Console.WriteLine ("Custom Security Manager Created.");

}

public override Hostsecuritymanager Hostsecuritymanager

{

Get

{

return xhhostsecuritymanager;

}

}

public override assemblyentryassembly

{

Get

{

Return base. entryassembly;

}

}

}

}