To get whole Content in word document. Please see the Code Below
Application wordApp = new ApplicationClass();
Document doc = null;
public string file_Name = "GeekGirl.doc";
object uploadFilePath="C:\FolderName" +file_Name ;
object missing = System.Reflection.Missing.Value;
object setFalse = false;
object saveChanges = WdSaveOptions.wdSaveChanges;
object setTrue = true;
doc = wordApp.Documents.Open( ref uploadFilePath
ref setFalse, ref setFalse, ref setFalse, ref missing,
ref missing, ref setTrue, ref missing, ref missing,
ref missing, ref missing, ref setFalse, ref setFalse,
ref missing, ref setTrue, ref missing);