Статья
11/18/2011

TypeAccessException Class

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

The exception that is thrown when a method attempts to use a type that it does not have access to.

Inheritance Hierarchy

System.Object
  System.Exception
    System.SystemException
      System.TypeLoadException
        System.TypeAccessException

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

Syntax

'Declaration
Public Class TypeAccessException _
    Inherits TypeLoadException

public class TypeAccessException : TypeLoadException

The TypeAccessException type exposes the following members.

Constructors

	Name	Description
	TypeAccessException()	Initializes a new instance of the TypeAccessException class with a system-supplied message that describes the error.
	TypeAccessException(String)	Initializes a new instance of the TypeAccessException class with a specified message that describes the error.
	TypeAccessException(String, Exception)	Initializes a new instance of the TypeAccessException 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
	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 the error message for this exception. (Inherited from TypeLoadException.)
	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
	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.)

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Remarks

TypeAccessException is thrown when a method attempts to cast an object to a type that is not accessible from the method. For example, an anonymously hosted dynamic method cannot access a security-critical type because the method is transparent. If the method contains a OpCodes.Castclass instruction that casts an object to a security-critical type, or to a generic type that has a security-critical type as one of its type parameters, TypeAccessException is thrown by the JIT compiler.

Similarly, TypeAccessException is thrown for a dynamic method that uses an internal type from another assembly. A method might not have access to its containing type, its return type, or one of its parameter types.

Version Information

Silverlight

Supported in: 5, 4

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.

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