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DnsPermission Class

Controls rights to access Domain Name System (DNS) servers on the network.

Namespace:  System.Net
Assembly:  System (in System.dll)
[SerializableAttribute]
public ref class DnsPermission sealed : public CodeAccessPermission, 
	IUnrestrictedPermission

The DnsPermission type exposes the following members.

  NameDescription
Public methodDnsPermissionCreates a new instance of the DnsPermission class that either allows unrestricted DNS access or disallows DNS access.
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  NameDescription
Public methodAssertDeclares that the calling code can access the resource protected by a permission demand through the code that calls this method, even if callers higher in the stack have not been granted permission to access the resource. Using Assert can create security issues. (Inherited from CodeAccessPermission.)
Public methodCopyCreates an identical copy of the current permission instance. (Overrides CodeAccessPermission::Copy().)
Public methodDemandForces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodDeny Obsolete. Prevents callers higher in the call stack from using the code that calls this method to access the resource specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodEqualsDetermines whether the specified CodeAccessPermission object is equal to the current CodeAccessPermission. (Inherited from CodeAccessPermission.)
Public methodFromXmlReconstructs a DnsPermission instance from an XML encoding. (Overrides CodeAccessPermission::FromXml(SecurityElement).)
Public methodGetHashCodeGets a hash code for the CodeAccessPermission object that is suitable for use in hashing algorithms and data structures such as a hash table. (Inherited from CodeAccessPermission.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIntersectCreates a permission instance that is the intersection of the current permission instance and the specified permission instance. (Overrides CodeAccessPermission::Intersect(IPermission).)
Public methodIsSubsetOfDetermines whether the current permission instance is a subset of the specified permission instance. (Overrides CodeAccessPermission::IsSubsetOf(IPermission).)
Public methodIsUnrestrictedChecks the overall permission state of the object.
Public methodPermitOnlyPrevents callers higher in the call stack from using the code that calls this method to access all resources except for the resource specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodToStringCreates and returns a string representation of the current permission object. (Inherited from CodeAccessPermission.)
Public methodToXmlCreates an XML encoding of a DnsPermission instance and its current state. (Overrides CodeAccessPermission::ToXml().)
Public methodUnionCreates a permission instance that is the union of the current permission instance and the specified permission instance. (Overrides CodeAccessPermission::Union(IPermission).)
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The default permissions allow all local and Intranet zone applications to access DNS services, and no DNS permission for Internet zone applications.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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