InvalidCastException Class (System)

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.NET Framework 4.5

Other Versions

The exception that is thrown for invalid casting or explicit conversion.

Inheritance Hierarchy

System.Object
  System.Exception
    System.SystemException
      System.InvalidCastException

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

Syntax

C++

[SerializableAttribute]
[ComVisibleAttribute(true)]
public class InvalidCastException : SystemException

The InvalidCastException type exposes the following members.

Constructors

	Name	Description
	InvalidCastException()	Initializes a new instance of the InvalidCastException class.
	InvalidCastException(String)	Initializes a new instance of the InvalidCastException class with a specified error message.
	InvalidCastException(SerializationInfo, StreamingContext)	Initializes a new instance of the InvalidCastException class with serialized data.
	InvalidCastException(String, Exception)	Initializes a new instance of the InvalidCastException class with a specified error message and a reference to the inner exception that is the cause of this exception.
	InvalidCastException(String, Int32)	Initializes a new instance of the InvalidCastException class with a specified message and error code.

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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.)
	HelpLink	Gets or sets a link to the help file associated with this 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.)
	Source	Gets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
	StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
	TargetSite	Gets the method that throws the current exception. (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 it 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.)
	GetObjectData	When overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception.)
	GetType	Gets the runtime type of the current instance. (Inherited from Exception.) In XNA Framework 3.0, this member is inherited from Object.GetType(). In Portable Class Library Portable Class Library, this member is inherited from Object.GetType(). In .NET for Windows Store apps Windows 8, this member is inherited from Object.GetType().
	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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Events

	Name	Description
	SerializeObjectState	Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)

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Remarks

InvalidCastException is thrown if:

For a conversion from a Single or a Double to a Decimal, the source value is infinity, Not-a-Number (NaN), or too large to be represented as the destination type.
A failure occurs during an explicit reference conversion.

For an explicit reference conversion to be successful, the source value must be null, or the object type referenced by the source argument must be convertible to the destination type by an implicit reference conversion.

For information on conversions supported by the system, see the Convert class. For errors that occur when the destination type can store source type values, but is not large enough to store a specific source value, see OverflowException exception.

The following Microsoft intermediate language (MSIL) instructions throw InvalidCastException

castclass
refanyval
unbox

InvalidCastException uses the HRESULT COR_E_INVALIDCAST, which has the value 0x80004002.

For a list of initial property values for an instance of InvalidCastException, see the InvalidCastException constructors.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Platforms

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.

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.

Reference

System Namespace

Exception

Other Resources

Handling and Throwing Exceptions

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