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XElement Explicit Conversion (XElement to Nullable<TimeSpan>)

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

This API is not CLS-compliant. 

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

public static explicit operator Nullable<TimeSpan> (
	XElement element


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

Return Value

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


The element does not contain a valid TimeSpan value.

The value space of an attribute or element that contains time span content is closely related to duration content as described in ISO 8601. When creating an attribute or element that contains time span content, the attribute or element values are formatted per the W3C specification. Please see the W3C specification for more details.

Behavior is lax when casting to a Nullable<T> of TimeSpan from an attribute or element. Even if the attribute or element value is not formatted exactly per the W3C specification, the value is appropriately converted to a Nullable<T> of TimeSpan.

The following example creates an element with time span content. It then retrieves the value by casting to Nullable<T> of TimeSpan.

XElement root = new XElement("Root",
    new XElement("Value", new TimeSpan(1, 5, 30))
TimeSpan? value = (TimeSpan?)root.Element("Value");
Console.WriteLine("Nullable TimeSpan: value={0}", value == null ? "null" : value.ToString());

This example produces the following output:

Nullable TimeSpan: value=01:05:30

.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.