InvalidCastException Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

Inheritance Hierarchy


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


Public Class InvalidCastException _
    Inherits SystemException
public class InvalidCastException : SystemException

The InvalidCastException type exposes the following members.


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(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.



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 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.)



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 nullNothingnullptra null reference (Nothing in Visual Basic), 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

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

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0


Windows Phone

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


System Namespace