问如何使用OpenXML删除符号符号和段落之间的空白内容

EN

var a = new AbstractNum(
                                new Nsid() { Val = "FFFFFF80" }
                                , new MultiLevelType() { Val = MultiLevelValues.HybridMultilevel }
                                , new Level(
                                  new LevelSuffix { Val = LevelSuffixValues.Space, },
                                  new NumberingFormat() { Val = NumberFormatValues.Bullet },
                                  new LevelText() { Val = "-" }
                                ) { LevelIndex = 0 }
                              ) { AbstractNumberId = abstarctnumberId };