Cannot read that as a zip file. How can I fix this?

[Akhil963]

I am trying to store output of a program into word file and using the concept shown in code below.

However, doing that I am getting this error "Cannot read that as a zip file" at the Document.docx stage.

How can I fix this error?

using GemBox.Document;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp4
{
class Program
{
static void Main(string[] args)
{
int a = 42;
int b = 119;
int c = a + b;
Console.WriteLine(c);
var previousWriter = Console.Out;
var textWriter = new StringWriter();
Console.SetOut(textWriter);
Console.SetOut(previousWriter);
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
var document = DocumentModel.Load("Document.docx");
document.Content.End.LoadText(textWriter.ToString());
document.Save("Document.docx");
}
}
}

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