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Decimal Explicit Conversion (Single to Decimal)


Defines an explicit conversion of 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.

Exception Condition

value is less than Decimal.MinValue or greater than Decimal.MaxValue.


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

The following example converts Single values to Decimal numbers by 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

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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