Convert.ToDouble Method (Decimal)

Converts the value of the specified Decimal number to an equivalent double-precision floating point number.

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

public static double ToDouble(
	decimal value


Type: System.Decimal
A Decimal number.

Return Value

Type: System.Double
A double-precision floating point number equivalent to the value of value.

The following code sample illustrates the conversion of a Decimal value to a Double one, using ToDouble.

public void ConvertDoubleDecimal(decimal decimalVal)
   double doubleVal;

   // Decimal to double conversion cannot overflow.
   doubleVal = System.Convert.ToDouble(decimalVal);
   outputBlock.Text += String.Format("{0} as a double is: {1}",
         decimalVal, doubleVal) + "\n";

   // Conversion from double to decimal can overflow.
      decimalVal = System.Convert.ToDecimal(doubleVal);
      outputBlock.Text += String.Format("{0} as a decimal is: {1}",
         doubleVal, decimalVal) + "\n";
   catch (System.OverflowException)
      outputBlock.Text += String.Format(
         "Overflow in double-to-double conversion.") + "\n";


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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