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C# linq XML DeepCompare and tag removal

I am trying to remove a particular element named <source file="..." /> from my XML so I can compare them.
<?xml version="1.0" encoding="utf-8"?>
<!--XML document generated using OCR technology from Nuance Communications, Inc.-->
<document xmlns="http://www.nuance.com/omnipage/xml/ssdoc-schema3.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<page ocr-vers="OmniPageCSDK16" app-vers="PaperVision Capture">
<description backColor="d5d3d4">
<source file="D:\Users\user\AppData\Roaming\OCR\\PVCPROCESSING_8\a9cfb6f2-b170-46f6-a00a-2f1557baee26.tmp" dpix="150" dpiy="150" sizex="1279" sizey="1652" />
<theoreticalPage size="Letter" marginLeft="1700" marginTop="154" marginRight="739" marginBottom="3805" offsetX="-500" offsetY="-20" width="12240" height="15840" />
</description>
I have tried these methods to no avail. It compiles fine but isnt working
doc1.Root.Element("document").Descendants().Where(e=>e.Name == "source").Remove();
doc1.Root.Element("document").Elements().Where(e=>e.Name == "source").Remove();
doc2.Root.Elements().Where(e=>e.Name == "source").Remove();
doc1.Descendants("document").Where(e=>e.Name == "source").Remove();
Anyone have any clues to what I am doing wrong.

You don't take xmlnamespace into consideration.
See this simple example
string xml1 = "<document> </document>";
var elem1 = XDocument.Parse(xml1).Element("document"); //elem1 contains document
Now insert a namespace http://aaa (as in your case)
string xml2 = "<document xmlns=\"http://aaa\"> </document>";
var elem2 = XDocument.Parse(xml2).Element("document"); //elem2 is null
elem2 is null now.
How to solve? use XNamespace
XNamespace ns = "http://aaa";
var elem3 = XDocument.Parse(xml2).Element(ns + "document"); //elem3 contains document
And finally, a more complex example(see the usage of XmlNamespace):
string xml4 = "<document xmlns=\"http://aaa\"> <subitem> <subsubitem> </subsubitem> </subitem> </document>";
XNamespace ns = "http://aaa";
var elems4 = XDocument.Parse(xml4).Element(ns + "document").Descendants(ns + "subsubitem")
.ToList();

I am having an xml inside xml and want to test a condition is met inside the inner xml. C# solution required

<?xml version="1.0"?>
<TextType IsKey="false" Name="XMLReport"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Providers
xmlns="Reporting"/>
<Sales
xmlns="Reporting"/>
<Value
xmlns="Reporting">
<?xml version="1.0" encoding="utf-8"?>
<TestReport>
<StudyUid>
<![CDATA[123]]>
</StudyUid>
<Modality>
<![CDATA[XYZ]]>
</Modality>
<StudyDate format="DICOM">123456</StudyDate>
<StudyTime format="DICOM">6789</StudyTime>
<AccessionNumber>
<![CDATA[123]]>
</AccessionNumber>
<StudyDescription>
<![CDATA[abc def]]>
</StudyDescription>
<OperatorName format="xyz">
<![CDATA[abc]]>
</OperatorName>
<PhysicianReadingStudy format="xyz">
<![CDATA[^^^^]]>
</PhysicianReadingStudy>
<InstitutionName>
<![CDATA[xyz]]>
</InstitutionName>
<HospitalName>
<![CDATA[Hospital Name]]>
</HospitalName>
<ReportSet>
<MyReport ID="1">
<ReportStatus>
<![CDATA[Done]]>
</ReportStatus>
</MyReport>
<MyReport ID="2">
<ReportStatus>
<![CDATA[Done]]>
</ReportStatus>
</MyReport>
<MyReport ID="3">
<ReportStatus>
<![CDATA[Initial]]>
</ReportStatus>
</MyReport>
</ReportSet>
<ReportImageSet />
<FetusSet />
</TestReport>
</Value>
<WhoSetMe xmlns="Reporting">NotSpecified
</WhoSetMe>
</TextType>
I want to parse the xml above in C# and check whether "ReportStatus" is "Done" for all the ReportStatus under MyReport/ReportSet. One more twist here is the xml contains one more xml starts at "Value" tag as in above example.It may contatin many ReportStatus tag under ReportSet tag. Can someone please help me?

// Can you try this? I tried to do it with LINQ to XML.
// I assume you have multiple <TestReport /> elements in <Value /> tag
// and var xelement is your xml variable
// First we get all TestReport elemnts
IEnumerable<XElement> allReports =
from el in xelement.Elements("TextType/Value/TestReport")
select el;
// From allReports we get all MyReport elemnts
IEnumerable<XElement> allMyReports =
from el in allReports.Elements("ReportSet/MyReport")
select el;
// From allReports we also get all MyReport elemnts with element ReportStatus value equals "Done"
IEnumerable<XElement> allDoneMyReports =
from el in allMyReports
where (string)el.Element("ReportStatus") == "Done"
select el;
// Now we compare allMyReport with allDoneMyReports
if (allMyReports.Count() == allDoneMyReports.Count())
{
//DO Somehing
}

Your XML document is invalid. You need to fix it before trying to parse it. The issue is that a document can only have one top-level element; you have 2 <TextType> and <Providers>.
Most of your elements are the namespace Reporting. You need to use it when referencing the element.
XNamespace ns = "Reporting";
var value = doc.Element("Value" + ns);
Update
Just use the namespace for each element
XNamespace ns = "Reporting";
var value = xelement.Elements("Value" + ns);
Another Update
The XML document is considered invalid because it has multiple XML declarations; there is no way to disable this. I suggest you pre-process the document to remove the extra declarations. Here's an example (https://dotnetfiddle.net/UnuAF6)
var xml = "<?xml version='1.0'?><a> <?xml version='1.0'?><b id='b' /></a>";
var doc = XDocument.Parse(xml.Replace(" <?xml version='1.0'?", " "));
var bs = doc.Descendants("b");
Console.WriteLine("{0} 'b' elements", bs.Count());

Getting an XElement with a namespace via XPathSelectElements

I have an XML e.g.
<?xml version="1.0" encoding="utf-8"?>
<A1>
<B2>
<C3 id="1">
<D7>
<E5 id="abc" />
</D7>
<D4 id="1">
<E5 id="abc" />
</D4>
<D4 id="2">
<E5 id="abc" />
</D4>
</C3>
</B2>
</A1>
This is may sample code:
var xDoc = XDocument.Load("Test.xml");
string xPath = "//B2/C3/D4";
//or string xPath = "//B2/C3/D4[#id='1']";
var eleList = xDoc.XPathSelectElements(xPath).ToList();
foreach (var xElement in eleList)
{
Console.WriteLine(xElement);
}
It works perfectly, but if I add a namespace to the root node A1, this code doesn't work.
Upon searching for solutions, I found this one, but it uses the Descendants() method to query the XML. From my understanding, this solution would fail if I was searching for <E5> because the same tag exists for <D7>, <D4 id="1"> and <D4 id="2">
My requirement is to search if a node exists at a particular XPath. If there is a way of doing this using Descendants, I'd be delighted to use it. If not, please guide me on how to search using the name space.
My apologies in case this is a duplicate.

To keep using XPath, you can use something link this:
var xDoc = XDocument.Parse(#"<?xml version='1.0' encoding='utf-8'?>
<A1 xmlns='urn:sample'>
<B2>
<C3 id='1'>
<D7><E5 id='abc' /></D7>
<D4 id='1'><E5 id='abc' /></D4>
<D4 id='2'><E5 id='abc' /></D4>
</C3>
</B2>
</A1>");
// Notice this
XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());
nsmgr.AddNamespace("sample", "urn:sample");
string xPath = "//sample:B2/sample:C3/sample:D4";
var eleList = xDoc.XPathSelectElements(xPath, nsmgr).ToList();
foreach (var xElement in eleList)
{
Console.WriteLine(xElement);
}

but it uses the Descendants() method to query the XML. From my understanding, this solution would fail if I was searching for because the same tag exists for , and
I'm pretty sure you're not quite understanding how that works. From the MSDN documentation:
Returns a filtered collection of the descendant elements for this document or element, in document order. Only elements that have a matching XName are included in the collection.
So in your case, just do this:
xDoc.RootNode
.Descendants("E5")
.Where(n => n.Parent.Name.LocalName == "B4");

Try this
var xDoc = XDocument.Parse("<A1><B2><C3 id=\"1\"><D7><E5 id=\"abc\" /></D7><D4 id=\"1\"><E5 id=\"abc\" /></D4><D4 id=\"2\"><E5 id=\"abc\" /></D4></C3></B2></A1>");
foreach (XElement item in xDoc.Element("A1").Elements("B2").Elements("C3").Elements("D4"))
{
Console.WriteLine(item.Element("E5").Value);//to get the value of E5
Console.WriteLine(item.Element("E5").Attribute("id").Value);//to get the value of attribute
}

Problems working with LINQ to XML

I'm trying to work with LINQ to XML to parse the notifications I'm getting from Google Checkout.
The response is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<authorization-amount-notification xmlns="http://checkout.google.com/schema/2" serial-number="153286076708098-00005-6">
<authorization-amount currency="USD">60.0</authorization-amount>
<authorization-expiration-date>2011-07-03T21:27:48.000Z</authorization-expiration-date>
<avs-response>Y</avs-response>
<cvn-response>M</cvn-response>
<timestamp>2011-06-26T21:28:48.741Z</timestamp>
<google-order-number>153286076708098</google-order-number>
<order-summary>
<total-chargeback-amount currency="USD">0.0</total-chargeback-amount>
<google-order-number>153286076708098</google-order-number>
<total-charge-amount currency="USD">0.0</total-charge-amount>
<total-refund-amount currency="USD">0.0</total-refund-amount>
<risk-information>
<ip-address>77.42.229.34</ip-address>
<billing-address>
<address1>somewhere in Beirut</address1>
<address2></address2>
<phone>70892555</phone>
<email>Technical#fisharwe.com</email>
<contact-name>Fisharwe User</contact-name>
<company-name></company-name>
<fax></fax>
<country-code>LB</country-code>
<city>Beirut</city>
<region></region>
<postal-code>1000</postal-code>
</billing-address>
<avs-response>Y</avs-response>
<cvn-response>M</cvn-response>
<eligible-for-protection>true</eligible-for-protection>
<partial-cc-number>1111</partial-cc-number>
<buyer-account-age>18</buyer-account-age>
</risk-information>
<authorization>
<authorization-amount currency="USD">60.0</authorization-amount>
<authorization-expiration-date>2011-07-03T21:27:48.000Z</authorization-expiration-date>
</authorization>
<purchase-date>2011-06-26T21:27:48.000Z</purchase-date>
<archived>false</archived>
<shopping-cart>
<items>
<item>
<item-name>Credits</item-name>
<item-description>Description</item-description>
<unit-price currency="USD">60.0</unit-price>
<quantity>1</quantity>
</item>
</items>
</shopping-cart>
<order-adjustment>
<merchant-codes />
<total-tax currency="USD">0.0</total-tax>
<adjustment-total currency="USD">0.0</adjustment-total>
</order-adjustment>
<promotions />
<buyer-id>975104325298289</buyer-id>
<buyer-marketing-preferences>
<email-allowed>false</email-allowed>
</buyer-marketing-preferences>
<buyer-shipping-address>
<address1>somewhere in Beirut</address1>
<address2></address2>
<phone>70892555</phone>
<email>Technical#fisharwe.com</email>
<contact-name>Fisharwe User</contact-name>
<company-name></company-name>
<fax></fax>
<structured-name>
<first-name>Fisharwe</first-name>
<last-name>User</last-name>
</structured-name>
<country-code>LB</country-code>
<city>Beirut</city>
<region></region>
<postal-code>1000</postal-code>
</buyer-shipping-address>
<order-total currency="USD">60.0</order-total>
<fulfillment-order-state>NEW</fulfillment-order-state>
<financial-order-state>CHARGEABLE</financial-order-state>
</order-summary>
</authorization-amount-notification>
Here's the code I'm using:
var serverResponse = _checkoutService.Post(data, GoogleCheckoutConstants.ReportsUri);
var xmlData = XDocument.Parse(serverResponse);
bool charged = false;
if(xmlData.Root.Name.Equals("authorization-amount-notification"))
{
var amount = (from c in xmlData.Elements()
where c.Name.Equals("authorization-amount")
select c).First().Value;
var googleNumber = (from c in xmlData.Elements()
where c.Name.Equals("google-order-number")
select c).First().Value;
_checkoutService.ChargeAndShip(googleNumber, amount);
charged = true;
}
This is the first time I use LINQ to XML, so I'm not really sure what's wrong with my code. But it's not even going inside the if statement. So when I replace the condition with:
if (serverResponse.IndexOf("authorization-amount-notification") > -1)
I end up getting errors telling me that the amount and googleNumber were not found.
Any suggestions?

You need to put the namespace in to the Xml, and you the Elements are SubElements of the Root Node.
You are only after one Element so doing Elements() then .First() is pointless. Just do Element() instead.
Also, you can match element names by passing in the Name of the Element + namespace to the Element() method.
var xmlData = XDocument.Parse(xml);
XNamespace ns = "http://checkout.google.com/schema/2";
if (xmlData.Root.Name == ns + "authorization-amount-notification")
{
var amount =
xmlData
.Root
.Element(ns + "authorization-amount")
.Value;
var googleNumber =
xmlData
.Root
.Element(ns + "google-order-number")
.Value;
_checkoutService.ChargeAndShip(googleNumber, amount);
charged = true;
}

What about...
if(xmlData.Root.Name.LocalName.Equals("new-order-notification")){
....
}
But the xml you posted doesn't seem to match the code your using.. The elements do not exist

C# XPath Not Finding Anything

I'm trying to use XPath to select the items which have a facet with Location values, but currently my attempts even to just select all items fail: The system happily reports that it found 0 items, then returns (instead the nodes should be processed by a foreach loop). I'd appreciate help either making my original query or just getting XPath to work at all.
XML
<?xml version="1.0" encoding="UTF-8" ?>
<Collection Name="My Collection" SchemaVersion="1.0" xmlns="http://schemas.microsoft.com/collection/metadata/2009" xmlns:p="http://schemas.microsoft.com/livelabs/pivot/collection/2009" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<FacetCategories>
<FacetCategory Name="Current Address" Type="Location"/>
<FacetCategory Name="Previous Addresses" Type="Location" />
</FacetCategories>
<Items>
<Item Id="1" Name="John Doe">
<Facets>
<Facet Name="Current Address">
<Location Value="101 America Rd, A Dorm Rm 000, Chapel Hill, NC 27514" />
</Facet>
<Facet Name="Previous Addresses">
<Location Value="123 Anywhere Ln, Darien, CT 06820" />
<Location Value="000 Foobar Rd, Cary, NC 27519" />
</Facet>
</Facets>
</Item>
</Items>
</Collection>
C#
public void countItems(string fileName)
{
XmlDocument document = new XmlDocument();
document.Load(fileName);
XmlNode root = document.DocumentElement;
XmlNodeList xnl = root.SelectNodes("//Item");
Console.WriteLine(String.Format("Found {0} items" , xnl.Count));
}
There's more to the method than this, but since this is all that gets run I'm assuming the problem lies here. Calling root.ChildNodes accurately returns FacetCategories and Items, so I am completely at a loss.
Thanks for your help!

Your root element has a namespace. You'll need to add a namespace resolver and prefix the elements in your query.
This article explains the solution. I've modified your code so that it gets 1 result.
public void countItems(string fileName)
{
XmlDocument document = new XmlDocument();
document.Load(fileName);
XmlNode root = document.DocumentElement;
// create ns manager
XmlNamespaceManager xmlnsManager = new XmlNamespaceManager(document.NameTable);
xmlnsManager.AddNamespace("def", "http://schemas.microsoft.com/collection/metadata/2009");
// use ns manager
XmlNodeList xnl = root.SelectNodes("//def:Item", xmlnsManager);
Response.Write(String.Format("Found {0} items" , xnl.Count));
}

Because you have an XML namespace on your root node, there is no such thing as "Item" in your XML document, only "[namespace]:Item", so when searching for a node with XPath, you need to specify the namespace.
If you don't like that, you can use the local-name() function to match all elements whose local name (the name part other than the prefix) is the value you're looking for. It's a bit ugly syntax, but it works.
XmlNodeList xnl = root.SelectNodes("//*[local-name()='Item']");