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AccessViolationException Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

The exception that is thrown when there is an attempt to read or write protected memory.

Inheritance Hierarchy

System.Object
  System.Exception
    System.SystemException
      System.AccessViolationException

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

Syntax

'Declaration
<ComVisibleAttribute(True)> _
Public Class AccessViolationException _
    Inherits SystemException
[ComVisibleAttribute(true)]
public class AccessViolationException : SystemException

The AccessViolationException type exposes the following members.

Constructors

  Name Description
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 AccessViolationException() Initializes a new instance of the AccessViolationException class with a system-supplied message that describes the error.
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 AccessViolationException(String) Initializes a new instance of the AccessViolationException class with a specified message that describes the error.
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 AccessViolationException(String, Exception) Initializes a new instance of the AccessViolationException class with a specified error message and a reference to the inner exception that is the cause of this exception.

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Properties

  Name Description
Public propertySupported by Silverlight for Windows PhoneSupported by Xbox 360 Data Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
Protected propertySupported by Silverlight for Windows PhoneSupported by Xbox 360 HResult Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
Public propertySupported by Silverlight for Windows PhoneSupported by Xbox 360 InnerException Gets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertySupported by Silverlight for Windows PhoneSupported by Xbox 360 Message Gets a message that describes the current exception. (Inherited from Exception.)
Public propertySupported by Silverlight for Windows PhoneSupported by Xbox 360 StackTrace Gets a string representation of the frames on the call stack at the time the current exception was thrown. (Inherited from Exception.)

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Methods

  Name Description
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 Finalize Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 GetBaseException When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 GetType Gets the runtime type of the current instance. (Inherited from Exception.)
Protected methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360 ToString Creates and returns a string representation of the current exception. (Inherited from Exception.)

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Remarks

An access violation occurs in unmanaged or unsafe code when the code attempts to read or write to memory that has not been allocated, or to which it does not have access. This usually occurs because a pointer has a bad value. Not all reads or writes through bad pointers lead to access violations, so an access violation usually indicates that several reads or writes have occurred through bad pointers, and that memory might be corrupted. Thus, access violations almost always indicate serious programming errors. In the .NET Framework version 2.0, an AccessViolationException clearly identifies these serious errors.

In programs consisting entirely of verifiable managed code, all references are either valid or null, and access violations are impossible. An AccessViolationException occurs only when verifiable managed code interacts with unmanaged code or with unsafe managed code.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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

See Also

Reference

Other Resources