winform 剔除空格与换行显示

string strTeachingPlan = this.txtTeachingPlan.Text.ToString().Trim(); 
string[] maarr = strTeachingPlan.Split(' '); //文本中隐含的回车换行符给去掉 每行末尾加上换行符" " 保存到数据库
                string strText = string.Empty;
                for (int i = 0; i < maarr.Length; i++)
                {
                    if (string.IsNullOrEmpty(maarr[i].ToString()))
                    {
                        continue;
                    }
                    strText += maarr[i].ToString() + " ";
                }

查询时 将 " " 替换为 " "
 this.txtTeachingPlan.Text = dt.Rows[0]["TeachingPlan"].ToString().Replace( " "," ");

Environment.NewLine; 获得环境中的定义的换行字符串 (保持平台的通用性)