iterate over word fields and formfields in LINQPad

IterateOverWordFields.cs

void Main()
{
	string sPath = @"c:\temp\somedoc.docx";
	ShowFields(sPath);
}
//using Microsoft.Office.Interop.Word
void ShowFields(string sPath)
{
	//references for the com objects
	Application oApp = null;
	Document oDoc = null;
	
	try{
	
		//set some ref values we'll need for word
		object oPath = sPath;
		object oMissing = System.Reflection.Missing.Value;
		object oFalse = true;
		
		//spin up word
		oApp = new Application();
		
		//hide it - remove this if needed
		oApp.Visible = false;
		
		//open the document
		oDoc = oApp.Documents.Open(
			ref oPath, ref oMissing, ref oMissing, ref oFalse
			, ref oMissing, ref oMissing, ref oMissing, ref oMissing
			, ref oMissing, ref oMissing, ref oMissing, ref oMissing
			, ref oMissing, ref oMissing, ref oMissing, ref oMissing );
			
		//iterate over the fields in a variety of ways
		oDoc.Iterate();
		
		//close out the doc
		oDoc.Close(ref oMissing, ref oMissing, ref oMissing);
		
		//quit the app
		oApp.Quit(ref oMissing, ref oMissing, ref oMissing);
	}
	catch(Exception ex){
		ex.Dump();
	}
	finally{
		//release the interop objects
		if (oDoc != null)
			System.Runtime.InteropServices.Marshal.ReleaseComObject(oDoc);
		if (oApp != null)
			System.Runtime.InteropServices.Marshal.ReleaseComObject(oApp);
		//null them out
		oDoc = null;
		oApp = null;
		//invoke GC just in case
		GC.Collect();
		GC.WaitForPendingFinalizers();
	}
}

static class myExtensions{
	public static void Iterate(this Document oDoc){
		(from oField in ((IEnumerable)oDoc.Fields).Cast<Field>()
			select new {
				Index = oField.Index
				, Result = oField.Result.Text
			}).Dump();
		(from oFormField in ((IEnumerable)oDoc.FormFields).Cast<FormField>()
			select new {
				Name = oFormField.Name
				, Result = oFormField.Result
			}).Dump();
		foreach (dynamic oField in oDoc.Fields)
 			Console.WriteLine("{0} - {1}", oField.Index, oField.Result.Text);
		foreach(FormField oField in oDoc.FormFields)
			Console.WriteLine("{0} - {1}", oField.Name, oField.Result);
		foreach(Field oField in oDoc.Fields)
			Console.WriteLine("{0} - {1}", oField.Index, oDoc.Fields[oField.Index].Result.Text);
	}
}