Windows Dev Center

The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

BigInteger Explicit Conversion (BigInteger to UInt32)


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

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

public static explicit operator uint (
	BigInteger value


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.

Exception Condition

value is less than UInt32.MinValue.


value is greater than UInt32.MaxValue.

The overloads of the Explicit(Decimal to BigInteger) 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.
BigInteger goodUInteger = 200000;
BigInteger badUInteger = 65000000000;

uint uIntegerFromBigInteger;

// Successful conversion using cast operator. 
uIntegerFromBigInteger = (uint) goodInteger;

// Handle conversion that should result in overflow.
   uIntegerFromBigInteger = (uint) badUInteger;
catch (OverflowException e)
   Console.WriteLine("Unable to convert {0}:\n   {1}", 
                     badUInteger, e.Message);

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 4.0
Windows Phone
Available since 8.1
Return to top
© 2015 Microsoft