c# word 在当前光标位置插入内容

/// <summary>
        /// 在当前光标位置插入内容
        /// </summary>
        /// <param name="text">内容</param>
        public void SelectionInsertText(string text)
        {
            Word.Selection currentSelection = Application.Selection;

            // Store the user's current Overtype selection
            bool userOvertype = Application.Options.Overtype;

            // Make sure Overtype is turned off.
            if (Application.Options.Overtype)
            {
                Application.Options.Overtype = false;
            }

            // Test to see if selection is an insertion point.
            if (currentSelection.Type == Word.WdSelectionType.wdSelectionIP)
            {
                //currentSelection.TypeText("Inserting at insertion point. ");
                currentSelection.TypeText(text);
                currentSelection.TypeParagraph();
            }
            else
            {
                if (currentSelection.Type == Word.WdSelectionType.wdSelectionNormal)
                {
                    // Move to start of selection.
                    if (Application.Options.ReplaceSelection)
                    {
                        object direction = Word.WdCollapseDirection.wdCollapseStart;
                        currentSelection.Collapse(ref direction);
                    }
                    //currentSelection.TypeText("Inserting before a text block. ");
                    currentSelection.TypeText(text);
                    currentSelection.TypeParagraph();
                }
                else
                {
                    // Do nothing.
                }
            }

            // Restore the user's Overtype selection
            Application.Options.Overtype = userOvertype;
        }