C# word 删除空白段落

 /// 

        /// 删除空白段落
        /// 
        /// 
        public static void DelNULLPargraph(string filePath)
        {
            Microsoft.Office.Interop.Word.Application wordapp = null;
            Microsoft.Office.Interop.Word.Document doc = null;

            try
            {
                wordapp = new Microsoft.Office.Interop.Word.Application();
                wordapp.Visible = false;
                doc = wordapp.Documents.Open(filePath);
                Microsoft.Office.Interop.Word.Paragraph paragraph;
                Microsoft.Office.Interop.Word.Paragraphs paragraphs = doc.Paragraphs;
                // 0 也可以写成 3 或者你需要从第几行开始删除空段
                for (int i = paragraphs.Count; i > 0; i--)
                {
                    paragraph = paragraphs[i];
                    //  如果段落的文本为空的话，首先选择该段落，然后再调用Word中Selection对象的Delete方法来删除
                    // 不为空什么都不做
                    if (paragraph.Range.Text.Trim() == "")
                    {
                        paragraph.Range.Select();
                        wordapp.Selection.Delete();
                    }
                }
                if (doc != null)
                {
                    // 先保存所有修改再关闭Word文档
                    doc.Save();
                    ((Microsoft.Office.Interop.Word._Document)doc).Close();
                    //GC.Collect();
                }
            }
            catch (Exception ex)
            {

            }
            finally
            {
                // 释放资源
                // 退出Word程序
                if (wordapp != null)
                {
                    ((Microsoft.Office.Interop.Word._Application)wordapp).Quit();
                }
                doc = null;
                wordapp = null;
            }
        }