XAttribute Explicit Conversion (XAttribute to Nullable<UInt64>)

equivalentCodeEntityop_Explicit(XAttribute attribute)

Cast the value of this XAttribute 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> (
	XAttribute attribute


Type: System.Xml.Linq.XAttribute

The XAttribute to cast to a Nullable<T> of UInt64.

Return Value

Type: System.Nullable<UInt64>

A Nullable<T> of UInt64 that contains the content of this XAttribute.

Exception Condition

The attribute does not contain a valid UInt64 value.

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

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

This example produces the following output:

Nullable ulong: value=9223372036854775807

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
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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