Explicit Conversion (Double to Decimal)

Decimal Explicit Conversion (Double to Decimal)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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 Example
   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(System.Windows.Controls.TextBlock outputBlock, double argument)
      object decValue;

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

      outputBlock.Text += String.Format(formatter, argument, decValue) + "\n";

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      outputBlock.Text += 
          "This example of the explicit conversion from double " +
          "to decimal \ngenerates the following output.\n" + "\n";
      outputBlock.Text += String.Format(formatter, "double argument",
          "decimal value") + "\n";
      outputBlock.Text += String.Format(formatter, "---------------",
          "-------------") + "\n";

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

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

© 2017 Microsoft