C# Microsoft.Office.Word.Interop删除注释

以下是我需要帮助的代码部分：

for (int i = 1; i <= doc2.Comments.Count; i++)
            {


                Console.WriteLine(doc2.Comments[i].Author);
                Console.WriteLine(doc2.Comments[i].Range.Text);
                Console.WriteLine("The number of comments is: " + doc2.Comments.Count);
                var regex = new System.Text.RegularExpressions.Regex("Ignore", System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.Compiled);
                Console.WriteLine("Regex result is " + regex.IsMatch(doc2.Comments[i].Range.Text).ToString());
                Console.WriteLine("Comment Content is : '" + doc2.Comments[i].Range.Text+"'");

                if (regex.IsMatch(doc2.Comments[i].Range.Text))
                {
                    Console.WriteLine("Deleting a comment that reads - '" + doc2.Comments[i].Range.Text + "'");

                    doc2.Comments[i].Range.Delete();
                    doc2.Comments[i].Scope.Delete();
                    doc2.Comments[i].DeleteRecursively();
                }

            }

for（int i=1；i