Convert.ToBoolean Method (Double)

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

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

public static bool ToBoolean(
	double value
)

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.Boolean
true if value is not zero; otherwise, false.

The following example converts a Boolean to a Double and a Double to a Boolean 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, 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 Silverlight 8.1, Windows Phone Silverlight 8

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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