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ExecutionContext Class (System.Threading) | Microsoft Learn

Manages the execution context for the current thread. This class cannot be inherited.

public ref class ExecutionContext sealed

public ref class ExecutionContext sealed : IDisposable, System::Runtime::Serialization::ISerializable

public ref class ExecutionContext sealed : System::Runtime::Serialization::ISerializable

public sealed class ExecutionContext

public sealed class ExecutionContext : IDisposable, System.Runtime.Serialization.ISerializable

[System.Serializable]
public sealed class ExecutionContext : System.Runtime.Serialization.ISerializable

[System.Serializable]
public sealed class ExecutionContext : IDisposable, System.Runtime.Serialization.ISerializable

type ExecutionContext = class

type ExecutionContext = class
    interface IDisposable
    interface ISerializable

[<System.Serializable>]
type ExecutionContext = class
    interface ISerializable

[<System.Serializable>]
type ExecutionContext = class
    interface IDisposable
    interface ISerializable

Public NotInheritable Class ExecutionContext

Public NotInheritable Class ExecutionContext
Implements IDisposable, ISerializable

Public NotInheritable Class ExecutionContext
Implements ISerializable

Inheritance

Attributes

Implements

The ExecutionContext class provides a single container for all information relevant to a logical thread of execution. In .NET Framework, this includes security context, call context, and synchronization context. In .NET Core, the security context and call context are not supported, however, the impersonation context and culture would typically flow with the execution context. Also in .NET Core, the synchronization context does not flow with the execution context, whereas in .NET Framework it may in some cases. For more information, see ExecutionContext vs SynchronizationContext.

The ExecutionContext class provides the functionality for user code to capture and transfer this context across user-defined asynchronous points. The common language runtime ensures that the ExecutionContext is consistently transferred across runtime-defined asynchronous points within the managed process.

• The following is applicable to .NET Framework only. -

An execution context is the managed equivalent of a COM apartment. Within an application domain, the entire execution context must be transferred whenever a thread is transferred. This situation occurs during transfers made by the Thread.Start method, most thread pool operations, and Windows Forms thread marshaling through the Windows message pump. It does not occur in unsafe thread pool operations (such as the UnsafeQueueUserWorkItem method), which do not transfer the compressed stack. Wherever the compressed stack flows, the managed principal, synchronization, locale, and user context also flow. The ExecutionContext class provides the Capture and CreateCopy methods to get the execution context and the Run method to set the execution context for the current thread.

An ExecutionContext that is associated with a thread cannot be set on another thread. Attempting to do so will result in an exception being thrown. To propagate the ExecutionContext from one thread to another, make a copy of the ExecutionContext.

Internally, the ExecutionContext stores all data that is associated with the LogicalCallContext. This allows the LogicalCallContext data to be propagated when the ExecutionContext is copied and transferred.

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