Linq to XML - Find an element

[Koreani]

I am sure that this is basic and probably was asked before, but I am only starting using Linq to XML.I have a simple XML that i need to read and write to.\[code\]<Documents>... <Document> <GUID>09a1f55f-c248-44cd-9460-c0aab7c017c9-0</GUID> <ArchiveTime>2012-05-15T14:27:58.5270023+02:00</ArchiveTime> <ArchiveTimeUtc>2012-05-15T12:27:58.5270023Z</ArchiveTimeUtc> <IndexDatas> <IndexData> <Name>Name1</Name> <Value>Some value</Value> <DataType>1</DataType> <CreationTime>2012-05-15T14:27:39.6427753+02:00</CreationTime> <CreationTimeUtc>2012-05-15T12:27:39.6427753Z</CreationTimeUtc> </IndexData> <IndexData> <Name>Name2</Name> <Value>Some value</Value> <DataType>3</DataType> <CreationTime>2012-05-15T14:27:39.6427753+02:00</CreationTime> <CreationTimeUtc>2012-05-15T12:27:39.6427753Z</CreationTimeUtc> </IndexData> ... </IndexDatas></Document>...</Documents>\[/code\]I have a "Documents" node that contains bunch of "Document" nodes.I have GUID of the document and a "IndexData" name. I need to find the document by GUID and check if it has "IndexData" with some name.If it does not have it i need to add it.Any help would be apreciated, as i have problem with reading and searching trough elements.Currently I am trying to use (in C#):\[code\]IEnumerable<XElement> xmlDocuments = from c in XElement .Load(filePath) .Elements("Documents") select c;// fetch document XElement documentElementToEdit = (from c in xmlDocuments where (string)c.Element("GUID").Value =http://stackoverflow.com/questions/11356895/= GUID select c).Single();\[/code\]EDIT\[code\]xmlDocuments.Element("Documents").Elements("Document")\[/code\]This returns no result, even tho xmlDocuments.Element("Documents") does. It looks like i cant get Document nodes from Documents node.