This 论坛主题 包括一个 VB 程序，用于从多行文字中去除控制字符.代码指示了应该如何去除每个控制字符，因此在 C# 中编写类似的代码应该很简单.

This Forum thread includes a VB program to strip the control characters from the MText. The code indicates what should be done to strip each control character, so it should be straightforward to write something similar in C#.

此外，格式代码的文档可在 AutoCAD 文档.

Additionally, the documentation of the format codes is available in the AutoCAD documentation.