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Decimal Explicit Conversion (Single to Decimal)

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

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

public static explicit operator decimal (
	float value


Type: System.Single
The single-precision floating-point number to convert.

Return Value

Type: System.Decimal
The converted single-precision floating point number.


value is less than MinValue or greater than MaxValue.


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

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

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

class DecimalFromSingleDemo
    const string formatter = "{0,16:E7}{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 float argument; catch exceptions that are thrown.
    public static void DecimalFromSingle( float argument )
        object decValue;

        // Convert the float 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 float " +
            "to decimal \ngenerates the following output.\n" );
        Console.WriteLine( formatter, "float argument", 
            "decimal value" );
        Console.WriteLine( formatter, "--------------", 
            "-------------" );

        // Convert float values and display the results.
        DecimalFromSingle( 1.2345E-30F );
        DecimalFromSingle( 1.2345E-26F );
        DecimalFromSingle( 1.23456E-22F );
        DecimalFromSingle( 1.23456E-12F );
        DecimalFromSingle( 1.234567F );
        DecimalFromSingle( 1.234567E+12F );
        DecimalFromSingle( 1.2345678E+28F );
        DecimalFromSingle( 1.2345678E+30F );

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

  float argument                    decimal value
  --------------                    -------------
  1.2345000E-030                                0
  1.2345000E-026   0.0000000000000000000000000123
  1.2345600E-022    0.000000000000000000000123456
  1.2345600E-012              0.00000000000123456
  1.2345671E+000                         1.234567
  1.2345670E+012                    1234567000000
  1.2345678E+028    12345680000000000000000000000
  1.2345678E+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.