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AddInSecurityLevel Enumeration

Specifies the trust level that is granted to the application domain that an add-in is loaded into.

Namespace:  System.AddIn.Hosting
Assembly:  System.AddIn (in System.AddIn.dll)

[<SerializableAttribute>]
type AddInSecurityLevel

Member nameDescription
FullTrustUse the full trust security level for add-ins that are allowed to read and write to the local file system, create network connections, and read from the registry. This security level grants full access to the add-in's code access security (CAS) by applying the Unrestricted field.
HostUse the host security level to give the add-in the same permissions currently granted to the hosting code.

This setting has two purposes:

  • It represents the maximum permission set a host can grant to its add-ins.

  • It allows a ClickOnce or an Extensible Application Markup Language (XAML) Browser Application (XBAP) host to propagate its site of origin to its add-ins, which enables them to contact the server.

InternetUse the Internet security level for add-ins that have a low trust level.
IntranetUse the Intranet security level for add-ins that are located on a company's intranet. These add-ins can have a greater trust level because the servers and information are within a company's firewall.

The add-in system activates the add-in with the permission set that corresponds to the trust level specified for the add-in's application domain. That permission set is defined by the common language runtime's code access security (CAS) configuration.

The values of this enumeration cannot be combined by using the bitwise OR operation.

The following example activates an add-in with a specified trust level.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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