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AspNetHostingPermission Class

Controls access permissions in ASP.NET hosted environments. This class cannot be inherited.

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

[SerializableAttribute]
public sealed class AspNetHostingPermission : CodeAccessPermission, 
	IUnrestrictedPermission

The AspNetHostingPermission type exposes the following members.

  NameDescription
Public methodAspNetHostingPermission(AspNetHostingPermissionLevel)Initializes a new instance of the AspNetHostingPermission class with the specified permission level.
Public methodAspNetHostingPermission(PermissionState)Initializes a new instance of the AspNetHostingPermission class with the specified PermissionState enumeration value.
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  NameDescription
Public propertyLevelGets or sets the current hosting permission level for an ASP.NET application.
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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 methodCopyWhen implemented by a derived class, creates and returns an identical copy of the current permission object. (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 permission object with a specified state 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 methodIntersectWhen implemented by a derived class, creates and returns a permission that is the intersection of the current permission and the specified permission. (Overrides CodeAccessPermission.Intersect(IPermission).)
Public methodIsSubsetOfReturns a value indicating whether the current permission is a subset of the specified permission. (Overrides CodeAccessPermission.IsSubsetOf(IPermission).)
Public methodIsUnrestrictedReturns a value indicating whether unrestricted access to the resource that is protected by the current permission is allowed.
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 the permission object and its current state. (Overrides CodeAccessPermission.ToXml().)
Public methodUnionCreates a permission that is the union of the current permission and the specified permission. (Overrides CodeAccessPermission.Union(IPermission).)
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The AspNetHostingPermission class is used in conjunction with code access security to help protect public types in the System.Web namespaces. Code must be assigned at least the Minimal trust level to access protected ASP.NET classes.

The AspNetHostingPermission class's Level property is set by configuring the appropriate trust level in the trust configuration element. By default, the level attribute of the trust configuration element is set to Full. That is, by default, ASP.NET applications run under the Unrestricted level. When an ASP.NET application domain is created, ASP.NET reads the value specified for the level attribute of the trust configuration element, creates an instance of the AspNetHostingPermission class with the specified Level attribute, and then adds the class to the permission set for the application domain. For more information, see ASP.NET Trust Levels and Policy Files.

It is recommended that you set the level attribute of the trust configuration element to High for sites that are trusted. For sites that are not trusted, such as a Web server that hosts sites that run code from an external customer, it is recommended that you set the level attribute of the trust configuration element to Medium.

The permission sets that are defined by default for the .NET Framework (for example, LocalIntranet, Internet, and so on) do not include the AspNetHostingPermission permission. That is, the AspNetHostingPermission permission is only assigned, by default, to applications that are running under Full trust.

The following code example shows a class protected using the AspNetHostingPermission permission. Code must be running with at least Minimal AspNetHostingPermission permission Level in order to create an instance of the class.

using System;
using System.Web;
using System.Security.Permissions;

[AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Medium)]
public class CustomAspNetClass
{

}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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