Convert.ToDouble Method (Single)

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

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

public static double ToDouble(
	float value
)

Parameters

value
Type: System.Single

The single-precision floating-point number.

Return Value

Type: System.Double
A double-precision floating-point number that is equivalent to value.

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

		public void CovertDoubleFloat(double doubleVal) {	
			float floatVal = 0;

			// Double to float conversion cannot overflow.
				floatVal = System.Convert.ToSingle(doubleVal);
				System.Console.WriteLine("{0} as a float is {1}",
					doubleVal, floatVal);

			// Conversion from float to double cannot overflow.
			doubleVal = System.Convert.ToDouble(floatVal);
			System.Console.WriteLine("{0} as a double is: {1}",
				floatVal, doubleVal);
		}

.NET Framework

Supported in: 4.5.2, 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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