OverflowException Class
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)
System::Exception
System::SystemException
System::ArithmeticException
System::OverflowException
| Name | Description | |
|---|---|---|
![]() | OverflowException() | Initializes a new instance of the OverflowException class. |
![]() | OverflowException(SerializationInfo^, StreamingContext) | Initializes a new instance of the OverflowException class with serialized data. |
![]() | OverflowException(String^) | Initializes a new instance of the OverflowException class with a specified error message. |
![]() | OverflowException(String^, Exception^) | Initializes a new instance of the OverflowException 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.) |
![]() | 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 | |
![]() | 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.) |
| 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() | |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetObjectData(SerializationInfo^, StreamingContext) | 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.) |
![]() | MemberwiseClone() | |
![]() | ToString() | Creates and returns a string representation of the current exception.(Inherited from Exception.) |
| 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.) |
An OverflowException 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 OverflowException 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 OverflowException 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 OverflowException, 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.
byte value = 241; try { sbyte newValue = (sbyte) value; Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", value.GetType().Name, value, newValue.GetType().Name, newValue); } catch (OverflowException) { Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue); } // The example displays the following output: // Converted the Byte value 241 to the SByte value -15.
The following Microsoft intermediate language (MSIL) instructions throw an OverflowException:
add.ovf.<signed>
conv.ovf.<to type>
conv.ovf.<to type>.un
mul.ovf.<type>
sub.ovf.<type>
newarr
OverflowException uses the HRESULT COR_E_OVERFLOW, which has the value 0x80131516.
For a list of initial property values for an instance of OverflowException, see the OverflowException constructors.
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.



