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Explicit Conversion (BigInteger to UInt32)

BigInteger Narrowing Conversion (BigInteger to UInt32)

Defines an explicit conversion of a BigInteger object to an unsigned 32-bit integer value.

This API is not CLS-compliant. The CLS-compliant alternative is System.Int64.

Namespace:  System.Numerics
Assemblies:   System.Runtime.Numerics (in System.Runtime.Numerics.dll)
  System.Numerics (in System.Numerics.dll)

Public Shared Narrowing Operator CType ( _
	value As BigInteger _
) As UInteger


Type: System.Numerics.BigInteger

The value to convert to an unsigned 32-bit integer.

Return Value

Type: System.UInt32
An object that contains the value of the value parameter.


value is less than UInt32.MinValue.


value is greater than UInt32.MaxValue.

The overloads of the Narrowing method define the types to which or from which a BigInteger object can be converted. Language compilers do not perform this conversion automatically because it can involve data loss. Instead, they perform the conversion only if a casting operator (in C#) or a conversion function (such as CType or CUInt in Visual Basic) is used. Otherwise, they display a compiler error.

Because this operation defines a narrowing conversion, it can throw an OverflowException at run time if the BigInteger value is outside the range of the UInt32 data type. There is no loss of precision in the resulting UInt32 value if the conversion is successful.

The following example illustrates the conversion of BigInteger values to UInt32 values. It also handles an OverflowException that is thrown because the BigInteger value is outside the range of the UInt32 data type.

' BigInteger to UInt32 conversion. 
Dim goodUInteger As BigInteger = 200000
Dim badUInteger As BigInteger = 65000000000

Dim uIntegerFromBigInteger As UInteger 

' Convert using CType function.
uIntegerFromBigInteger = CType(goodInteger, UInteger)
' Convert using CUInt function.
uIntegerFromBigInteger = CUInt(goodInteger)

' Handle conversion that should result in overflow. 
   uIntegerFromBigInteger = CType(badUInteger, UInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badUInteger, vbCrLf, e.Message)
End Try

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Portable Class Library

Supported in: Portable Class Library
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