Convert.ToDouble Method (Single)


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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


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);

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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