The exception that is thrown when an arithmetic, casting, or conversion operation in a checked context results in an overflow.
Assembly: mscorlib (in mscorlib.dll)
Thetype exposes the following members.
|OverflowException||Initializes a new instance of the class.|
|OverflowException(String)||Initializes a new instance of the class with a specified error message.|
|OverflowException(String, Exception)||Initializes a new instance of the class with a specified error message and a reference to the inner exception that is the cause of this exception.|
|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.)|
|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 is thrown at run time under the following conditions:
An arithmetic operation produces a result that is outside the range of the data type returned by the operation. The following example illustrates the that is thrown by a multiplication operation that overflows the bounds of the Int32 type.
A casting or conversion operation attempts to perform a narrowing conversion, and the value of the source data type is outside the range of the target data type. The following example illustrates the that is thrown by the attempt to convert a large unsigned byte value to a signed byte value.
In each case, the result of the operation is a value that is less than the MinValue property or greater than the MaxValue property of the data type that results from the operation.
For the arithmetic, casting, or conversion operation to throw an , the operation must occur in a checked context. By default, arithmetic operations and overflows in Visual Basic are checked; in C#, they are not. If the operation occurs in an unchecked context, the result is truncated by discarding any high-order bits that do not fit into the destination type. The following example illustrates such an unchecked conversion in C#. It repeats the previous example in an unchecked context.
In languages that detect overflow, is the exception that gets thrown. For example, in C#, the checked keyword is used to detect overflow conditions. An exception occurs only in a checked context.
The following Microsoft intermediate language (MSIL) instructions throw :
uses the HRESULT COR_E_OVERFLOW, that has the value 0x80131516.
For a list of initial property values for an instance of , see the OverflowException constructors.
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