Convert.ToDouble Method (Boolean)

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

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

public static double ToDouble(
	bool value


Type: System.Boolean
A Boolean value.

Return Value

Type: System.Double
The number 1 if value is true; otherwise, 0.

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

public void ConvertDoubleBool(double doubleVal)
   bool boolVal;
   // Double to bool conversion cannot overflow.
   boolVal = System.Convert.ToBoolean(doubleVal);
   outputBlock.Text += String.Format("{0} as a Boolean is: {1}.",
      doubleVal, boolVal) + "\n";

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