This documentation is archived and is not being maintained.

XAttribute Explicit Conversion (XAttribute to UInt64)

Cast the value of this XAttribute to a UInt64.

This API is not CLS-compliant. 

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public static explicit operator ulong (
	XAttribute attribute


Type: System.Xml.Linq.XAttribute
The XAttribute to cast to UInt64.

Return Value

Type: System.UInt64
A UInt64 that contains the content of this XAttribute.


The attribute does not contain a valid UInt64 value.


The attribute parameter is null.

The following example creates an attribute with unsigned long integer content. It then retrieves the value by casting to UInt64.

XElement root = new XElement("Root",
    new XAttribute("Att", 1844674407370955161)
ulong value = (ulong)root.Attribute("Att");
Console.WriteLine("value={0}", value);

This example produces the following output:


.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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