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XElement Explicit Conversion (XElement to Nullable<UInt64>)

Cast the value of this XElement to a Nullable<T> of UInt64.

This API is not CLS-compliant. 

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

public static explicit operator Nullable<ulong> (
	XElement element
)

Parameters

element
Type: System.Xml.Linq.XElement
The XElement to cast to Nullable<T> of UInt64.

Return Value

Type: System.Nullable<UInt64>
A Nullable<T> of UInt64 that contains the content of this XElement.

ExceptionCondition
FormatException

The element does not contain a valid UInt64 value.

The following example creates an element with unsigned long integer content. It then retrieves the value by casting to Nullable<T> of UInt64.

XElement root = new XElement("Root", 
    new XElement("Value", 9223372036854775807)
);
ulong? value = (ulong?)root.Element("Value");
Console.WriteLine("Nullable ulong: value={0}", value == null ? "null" : value.ToString());

This example produces the following output:

Nullable ulong: value=9223372036854775807

.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.

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