AccessViolationException Class
The exception that is thrown when there is an attempt to read or write protected memory.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
The AccessViolationException type exposes the following members.
| Name | Description | |
|---|---|---|
![]() ![]() ![]() | AccessViolationException() | Initializes a new instance of the AccessViolationException class with a system-supplied message that describes the error. |
![]() ![]() ![]() | AccessViolationException(String) | Initializes a new instance of the AccessViolationException class with a specified message that describes the error. |
![]() ![]() ![]() | 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. |
| Name | Description | |
|---|---|---|
![]() ![]() ![]() | Data | Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.) |
![]() ![]() ![]() | HResult | Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.) |
![]() ![]() ![]() | InnerException | Gets the Exception instance that caused the current exception. (Inherited from Exception.) |
![]() ![]() ![]() | Message | Gets a message that describes the current exception. (Inherited from Exception.) |
![]() ![]() ![]() | StackTrace | Gets a string representation of the frames on the call stack at the time the current exception was thrown. (Inherited from Exception.) |
| Name | Description | |
|---|---|---|
![]() ![]() ![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() ![]() ![]() | 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.) |
![]() ![]() ![]() | GetBaseException | When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.) |
![]() ![]() ![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() ![]() ![]() | GetType | Gets the runtime type of the current instance. (Inherited from Exception.) |
![]() ![]() ![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() ![]() | ToString | Creates and returns a string representation of the current exception. (Inherited from Exception.) |
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.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

