BigInteger Explicit Conversion (BigInteger to SByte)

Defines an explicit conversion of a BigInteger object to a signed 8-bit value.

This API is not CLS-compliant. The CLS-compliant alternative is System.Int16.

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

public static explicit operator sbyte (
	BigInteger value


Type: System.Numerics.BigInteger

The value to convert to a signed 8-bit value.

Return Value

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


value is less than SByte.MinValue.


value is greater than SByte.MaxValue.

The overloads of the Explicit 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 CSByte 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 SByte data type. There is no loss of precision in the resulting SByte value if the conversion is successful.

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

// BigInteger to SByte conversion.
BigInteger goodSByte = BigInteger.MinusOne;
BigInteger badSByte = -130;

sbyte sByteFromBigInteger;

// Successful conversion using cast operator. 
sByteFromBigInteger = (sbyte) goodSByte;

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

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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