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Convert.ToDouble Method (Boolean)

Converts 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
)

Parameters

value
Type: System.Boolean

The Boolean value to convert.

Return Value

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

The following example converts a Boolean value to a Double value.

		public void ConvertDoubleBool(double doubleVal) {
			bool	boolVal;
			// Double to bool conversion cannot overflow.
			boolVal = System.Convert.ToBoolean(doubleVal);
			System.Console.WriteLine("{0} as a Boolean is: {1}.",
				doubleVal, boolVal);

			// bool to double conversion cannot overflow.
			doubleVal = System.Convert.ToDouble(boolVal);
			System.Console.WriteLine("{0} as a double is: {1}.",
				boolVal, doubleVal);
		}

.NET Framework

Supported in: 4.5.1, 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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