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Decimal Explicit Conversion (Double to Decimal)

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
The double-precision floating-point number to convert.

Return Value

Type: System.Decimal
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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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