SecurityContext Class

Encapsulates and propagates all security-related data for execution contexts transferred across threads. This class cannot be inherited.

System.Object
  System.Security.SecurityContext

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

public sealed class SecurityContext : IDisposable

The SecurityContext type exposes the following members.

  NameDescription
Public methodStatic memberCaptureCaptures the security context for the current thread.
Public methodCreateCopyCreates a copy of the current security context.
Public methodDisposeReleases all resources used by the current instance of the SecurityContext class.
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodStatic memberIsFlowSuppressedDetermines whether the flow of the security context has been suppressed.
Public methodStatic memberIsWindowsIdentityFlowSuppressedDetermines whether the flow of the Windows identity portion of the current security context has been suppressed.
Public methodStatic memberRestoreFlowRestores the flow of the security context across asynchronous threads.
Public methodStatic memberRunRuns the specified method in the specified security context on the current thread.
Public methodStatic memberSuppressFlowSuppresses the flow of the security context across asynchronous threads.
Public methodStatic memberSuppressFlowWindowsIdentitySuppresses the flow of the Windows identity portion of the current security context across asynchronous threads.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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A SecurityContext object captures all security-related information for a logical thread, including the information contained in the WindowsIdentity and CompressedStack objects. This configuration allows the Windows identity and the security elements on the stack to be propagated automatically when the SecurityContext is copied and transferred across asynchronous threads.

NoteNote

The common language runtime (CLR) is aware of impersonation operations performed using only managed code, not of impersonation performed outside of managed code, such as through platform invoke to unmanaged code or through direct calls to Win32 functions. Only managed WindowsIdentity objects can flow across asynchronous points, unless the alwaysFlowImpersonationPolicy element has been set to true (<alwaysFlowImpersonationPolicy enabled="true"/>). Setting the alwaysFlowImpersonationPolicy element to true specifies that the Windows identity always flows across asynchronous points, regardless of how impersonation was performed. For more information about flowing unmanaged impersonation across asynchronous points, see <alwaysFlowImpersonationPolicy> Element.

The SecurityContext is part of the larger ExecutionContext and flows or migrates when the ExecutionContext flows or migrates.

Important noteImportant

This type implements the IDisposable interface. When you have finished using the type, you should dispose of it either directly or indirectly. To dispose of the type directly, call its Dispose method in a try/catch block. To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). For more information, see the “Using an Object that Implements IDisposable” section in the IDisposable interface topic.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.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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