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Convert.ToDouble Method (UInt64)

Converts the value of the specified 64-bit unsigned integer to an equivalent double-precision floating-point number.

This API is not CLS-compliant. 

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
[CLSCompliantAttribute(false)]
public static double ToDouble(
	ulong value
)

Parameters

value
Type: System.UInt64

The 64-bit unsigned integer to convert.

Return Value

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

The following example converts each element in an array of UInt64 values to a Double value.

ulong[] numbers = { UInt64.MinValue, 121, 12345, UInt64.MaxValue };
double result;

foreach (ulong number in numbers)
{
   result = Convert.ToDouble(number);
   Console.WriteLine("Converted the UInt64 value {0} to {1}.",
                     number, result);
}   
// The example displays the following output: 
//    Converted the UInt64 value 0 to 0. 
//    Converted the UInt64 value 121 to 121. 
//    Converted the UInt64 value 12345 to 12345. 
//    Converted the UInt64 value 18446744073709551615 to 1.84467440737096E+19.

.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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