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Decimal.Explicit Operator

Converts a double-precision floating-point number to a Decimal.

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

public static explicit operator decimal (
	double value


Type: System.Double

A double-precision floating-point number.

Return Value

Type: System.Decimal
A Decimal that represents the converted double-precision floating point number.


value is less than MinValue or greater than MaxValue.


value is Double.NaN, Double.PositiveInfinity, or Double.NegativeInfinity.

The following code example converts Double values to Decimal numbers using the Double to Decimal conversion. This conversion requires the op_Explicit operator in Visual Basic.

// Example of the explicit conversion from double to decimal. 
using System;

class DecimalFromDoubleDemo
    const string formatter = "{0,25:E16}{1,33}";

    // Get the exception type name; remove the namespace prefix. 
    public static string GetExceptionType( Exception ex )
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring( 
            exceptionType.LastIndexOf( '.' ) + 1 );

    // Convert the double argument; catch exceptions that are thrown. 
    public static void DecimalFromDouble( double argument )
        object decValue;

        // Convert the double argument to a decimal value. 
            decValue = (decimal)argument;
        catch( Exception ex )
            decValue = GetExceptionType( ex );

        Console.WriteLine( formatter, argument, decValue );

    public static void Main( )
            "This example of the explicit conversion from double " +
            "to decimal \ngenerates the following output.\n" );
        Console.WriteLine( formatter, "double argument", 
            "decimal value" );
        Console.WriteLine( formatter, "---------------", 
            "-------------" );

        // Convert double values and display the results.
        DecimalFromDouble( 1.234567890123E-30 );
        DecimalFromDouble( 1.2345678901234E-25 );
        DecimalFromDouble( 1.23456789012345E-20 );
        DecimalFromDouble( 1.234567890123456E-10 );
        DecimalFromDouble( 1.2345678901234567 );
        DecimalFromDouble( 1.23456789012345678E+12 );
        DecimalFromDouble( 1.234567890123456789E+28 );
        DecimalFromDouble( 1.234567890123456789E+30 );

This example of the explicit conversion from double to decimal
generates the following output.

          double argument                    decimal value
          ---------------                    -------------
  1.2345678901230000E-030                                0
  1.2345678901233999E-025   0.0000000000000000000000001235
  1.2345678901234499E-020   0.0000000000000000000123456789
  1.2345678901234560E-010       0.000000000123456789012346
  1.2345678901234567E+000                 1.23456789012346
  1.2345678901234568E+012                 1234567890123.46
  1.2345678901234568E+028    12345678901234600000000000000
  1.2345678901234569E+030                OverflowException

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0