private void button1_Click(object sender, EventArgs e) { //Create word document Document document = new Document(); //load a document document.LoadFromFile(@"..\..\..\..\..\..\Data\FindAndReplace.doc"); //Replace text document.Replace(this.textBox1.Text, this.textBox2.Text,true,true); //Save doc file. document.SaveToFile("Sample.doc", FileFormat.Doc); //Launching the MS Word file. WordDocViewer("Sample.doc"); }