Moving cursor/insertion point to start of word document and insert new content from that point

[EDN Admin]

As the title suggest, Im trying to create word document through C#. Im able to create new document, but I also want to open an existing document and add the content to it from the beginning. That is I want the new content to appear at the top. Below is what Ive done so far, but always the content gets appended at the end.using System.IO;
using Word = Microsoft.Office.Interop.Word;
namespace Snapper
{
class WordDocumentGenerator
{
public void CreateWordDocument(string fileName)
{
string originalPath = Directory.GetCurrentDirectory();
string path = originalPath;
path += @"snapshots";
object oMissing = System.Reflection.Missing.Value;

//Create a new Word Application
Word._Application wordApp = new Word.Application();
wordApp.Visible = false;
try
{
//Create a new blank document
object filePath = originalPath + @"documents" + @"TSC1.doc";
Word._Document doc = wordApp.Documents.Open(ref filePath,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing);
string[] images = Directory.GetFiles(path);
//Create a range
object what = Word.WdGoToItem.wdGoToLine;
object which = Word.WdGoToDirection.wdGoToFirst;
object myTrue = true;
object myFalse = false;
doc.GoTo(ref what, ref which, ref oMissing, ref oMissing);

//Insert filename as header
var pText = doc.Paragraphs.Add(ref oMissing);
pText.Format.SpaceAfter = 10f;
pText.Range.Text = fileName;
pText.Range.InsertParagraphAfter();
foreach (var image in images)
{
var pImage = doc.Paragraphs.Add(ref oMissing);
pImage.Format.SpaceAfter = 10f;
object myRng = pImage.Range;
doc.InlineShapes.AddPicture(image, ref myFalse, ref myTrue, ref myRng);
}
path = originalPath;
path += @"documents";
DirectoryInfo docDir = new DirectoryInfo(path);
if (!docDir.Exists)
{
docDir.Create();
}
object savePath = path + @"" + fileName + ".doc";
doc.SaveAs(ref savePath,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing,
ref oMissing
);
doc.Save();
}
finally
{
wordApp.Quit(ref oMissing, ref oMissing, ref oMissing);
}
}

}
}
The document which I want my new content to be inserted already contain a series of text and images.
Ive also tried the combination of object units = Word.WdUnits.Story;
wordApp.Selection.HomeKey(ref units, ref oMissing);
var pText = doc.Paragraphs.Add(ref oMissing);
pText.Format.SpaceAfter = 10f;
pText.Range.InsertParagraphAfter();
Then I got advice to select the range of entire document and try to insert the new contentWord.Range rng;
object start = 0;
object end = 0;
object finalRng;
rng = Word.ActiveDocument.Range(ref start, ref end);
finalRng = rng;
Now Im able to move the cursor to beginning of doucment.
Ive created a range object and set its start and end refereces to 0 and 0. Now the content gets inserted to the beginning but there is a little problem in that insertion. The new content gets inserted upside down in the order of insertion. i.e. The first piece of content goes to the last and the second one goes previous to the last and so on until the last content becomes the first. What I havent tried is using the praragraphs[1].range yet.
BTW this is the code that Im using to insert my new content
Im looping through a List of strings which contains either text or path of the image. So my loop will decide what is the current iteration and will insert a paragraph//Before going into this for loop, I want my cursor/insertion point to be positioned
//at the top/starting of document and then insert the content one below the another through
//following looping condtruct.
for (var i = 0; i < 10; i++)
{
// Insert text
var pText = document.Paragraphs.Add();
pText.Format.SpaceAfter = 10f;
pText.Range.Text = String.Format("This is line #{0}", i);
pText.Range.InsertParagraphAfter();

// Insert picture
var pPicture = document.Paragraphs.Add();
pPicture.Format.SpaceAfter = 10f;
document.InlineShapes.AddPicture(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "img_1.png"), Range: pPicture.Range);
}

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