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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());

Extract data from XML using XmlDocument

I am consuming a weather web service in c#. I am passing it Lat-Long and it returns forecasted maximum & minimum temperature of that area. Following is code that i am using
var response = client.ndfdGen(latlong);
XmlDocument doc = new XmlDocument();
doc.LoadXml(response);
And the following is the response data, that I get i.e. xml response
In this response, there is Latitude and Longitude. I have to extract this.
<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:NDFDgenResponse xmlns:ns1="http://graphical.weather.gov/xml/DWMLgen/wsdl/ndfdXML.wsdl">
<dwmlOut xsi:type="xsd:string"><![CDATA[<?xml version="1.0"?>
<dwml version="1.0" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.nws.noaa.gov/forecasts/xml/DWMLgen/schema/DWML.xsd">
<head>
<product srsName="WGS 1984" concise-name="time-series" operational-mode="official">
<title>NOAA's National Weather Service Forecast Data</title>
<field>meteorological</field>
<category>forecast</category>
<creation-date refresh-frequency="PT1H">2015-04-15T15:13:07Z</creation-date>
</product>
<source>
<more-information>http://www.nws.noaa.gov/forecasts/xml/</more-information>
<production-center>Meteorological Development Laboratory<sub-center>Product Generation Branch</sub-center></production-center>
<disclaimer>http://www.nws.noaa.gov/disclaimer.html</disclaimer>
<credit>http://www.weather.gov/</credit>
<credit-logo>http://www.weather.gov/images/xml_logo.gif</credit-logo>
<feedback>http://www.weather.gov/feedback.php</feedback>
</source>
</head>
<data>
<location>
<location-key>point1</location-key>
<point latitude="39.01" longitude="-77.02"/>
</location>
<moreWeatherInformation applicable-location="point1">http://forecast.weather.gov/MapClick.php?textField1=39.01&textField2=-77.02</moreWeatherInformation>
<time-layout time-coordinate="local" summarization="none">
<layout-key>k-p24h-n2-1</layout-key>
<start-valid-time>2015-04-17T08:00:00-04:00</start-valid-time>
<end-valid-time>2015-04-17T20:00:00-04:00</end-valid-time>
<start-valid-time>2015-04-18T08:00:00-04:00</start-valid-time>
<end-valid-time>2015-04-18T20:00:00-04:00</end-valid-time>
</time-layout>
<parameters applicable-location="point1">
<temperature type="maximum" units="Fahrenheit" time-layout="k-p24h-n2-1">
<name>Daily Maximum Temperature</name>
<value>68</value>
<value>71</value>
</temperature>
</parameters>
</data>
</dwml>]]></dwmlOut>
</ns1:NDFDgenResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
I want to extract information in <time-layout time-coordinate="local" summarization="none"> like start-valid-time,end-valid-time and temperature from <temperature type="maximum" units="Fahrenheit" time-layout="k-p24h-n2-1"> tags.
How can I reach out to these nodes and iterate over it?

You're going to have to extract the CDATA first, that's really the only special challenge here - then you can use XmlDocument or XDocument or XmlReader. I'd recommend doing it this way:
var response = client.ndfdGen(latlong);
XDocument xd = null;
using (XmlReader xr = XmlReader.Create(new StringReader(response))) // load the response into an XmlReader
{
xr.ReadToDescendant("dwmlOut"); // go to the dwmlOut node
xr.Read(); // move to the CDATA in that node
xd = XDocument.Parse(xr.Value); // load **that** XML into your XDocument
}
string startTime = xd.Descendants("start-valid-time").First().Value;
and so on.
If you insist on using XmlDocument, you could use the same method here and just do XmlDocument.LoadFrom(xr.Value), but the XDocument API is a bit more flexible and will certianly perform better.

As suggested in the comments, using XDocument will get you access to a number of LINQ-to-XML methods built for just such a purpose:
// load up the xml into an XDocument
var response = client.ndfdGen(latlong);
var originalDocument = XDocument.Parse(response);
// extract cdata
var cdata = originalDocument.DescendantNodes().OfType<XCData>().First().Value;
var cdataDocument = XDocument.Parse(cdata);
// find the right element via xpath
var myElement = cdataDocument.Root.XPathSelectElement("//dwml/data/location/point");
return myElement.Attribute("latitude").Value;
Note that using the "//" operator in xPath doesn't have great performance. Try nailing down an absolute path once you get the proof of concept working. An explanation of the xPath operations available can be found on MSDN

Using XmlTextReader to Loop though XML attributes that have the same name

I am doing some practice code with the XmlTextReader. I have written some very basic XML as shown here:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<task name="mixed_sprite_task_test">
<sprite>
<type>animatedSprite</type>
<id>0</id>
<name>animatedSprite</name>
<fileName>iyezoz</fileName>
<startingPositionX>200</startingPositionX>
<startingPositionY>200</startingPositionY>
<sheetSizeX>12</sheetSizeX>
<sheetSizeY>35</sheetSizeY>
<startingFrameX>0</startingFrameX>
<startingFrameY>0</startingFrameY>
<startingState>standing</startingState>
<movementSpeed>15</movementSpeed>
<frameDelay>0.055</frameDelay>
</sprite>
<sprite>
<type>staticSprite</type>
<id>0</id>
<name>staticSprite</name>
<fileName>Super_Mario_63</fileName>
<startingPositionX>0</startingPositionX>
<startingPositionY>0</startingPositionY>
</sprite>
<sprite>
<type>simpleSprite</type>
<id>0</id>
<name>simpleSprite</name>
<fileName>imgres</fileName>
<startingPositionX>100</startingPositionX>
<startingPositionY>100</startingPositionY>
<movementSpeed>15</movementSpeed>
</sprite>
</task>
This file shows that I have a task. In the task I have 3 sprites.
In my code I want to loop through each sprite and collect the information.
I can get the data from the first sprite with no issue. Is there a certain way to loop through an xml with attributes of the same name?
Thank-you!

I prefer Linq2Xml.
var xDoc = XDocument.Parse(xmlstring); //or XDocument.Load(filename);
var sprites = xDoc.Descendants("sprite")
.Select(s=>s.Elements()
.ToDictionary(e=>e.Name.LocalName,e=>(string)e))
.ToList();
You can use it as
var type = sprites[0]["type"];
or can take a safe action
string delay;
if (sprites[1].TryGetValue("frameDelay", out delay))
{
Console.WriteLine(delay);
}

You can select all the nodes named "sprite"
var myXml = new XmlDocument();
myXml.Load(myDocument);
XmlNode rootElement = myXml.DocumentElement;
foreach (XmlNode item in rootElement.SelectNodes(#"/task/sprite"))
{
// do stuff with node
}

Changing an XML Child Element into a Parent

I have an xml document that has a structure like so:
<?xml version="1.0" encoding="iso-8859-1" ?>
- <newdataset xml="version="1.0" encoding="iso-8859-1"">
- <officelist>
<officeid>2</officeid>
<office>Office</office>
<region>BC</region>
I would like to have the office id = 2 to be its own element. Like so
<?xml version="1.0" encoding="iso-8859-1" ?>
<newdataset xml="version="1.0" encoding="iso-8859-1"">
<officelist>
<officeid id=2/>
<office>Office</office>
<region>BC</region>
</officeid>
</officelist>
</newdataset>
xmlDS += offices.GetXml();
xmlDS = xmlDS.Replace(#"xml:space=""preserve""", " ");
XmlDocument doc = new XmlDocument();
XmlNode declaration = doc.CreateNode(XmlNodeType.XmlDeclaration, null, null);
doc.LoadXml(xmlDS);
doc.Save(Response.OutputStream);
That is my code so far... not sure how to set a child node to become a parent node

using XDocument made this a lot easier with Linq.

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']");