一、創建相關對象，並定義Grid中的列屬性
Grid forwardAndReply = new Grid();//創建Grid對象
forwardAndReply.Margin = new Thickness(0, 10, 0, 5);
forwardAndReply.HorizontalAlignment = HorizontalAlignment.Right;
forwardAndReply.Height = 30;
//創建第一個ColumnDefinition
ColumnDefinition firstColumnDefinition = new ColumnDefinition();//定義Grid列屬性對象
firstColumnDefinition.Width = new GridLength(125, GridUnitType.Pixel);//初始化GridLength並設置指定的值
forwardAndReply.ColumnDefinitions.Add(firstColumnDefinition);//添加ColumnDefinition到Grid的列屬性集合中
//創建第二個ColumnDefinition
ColumnDefinition secondColumnDefinition = new ColumnDefinition();
secondColumnDefinition.Width = new GridLength(125, GridUnitType.Pixel);
forwardAndReply.ColumnDefinitions.Add(secondColumnDefinition);
二、將UI元素添加到指定的列中
RichTextBox content = new RichTextBox();//創建RichTextBox控件對象
Grid.SetColumn(forward,0);//設置即將要添加的UI元素所在的列，0為第一列
forwardAndReply.Children.Add(forward);//添加UI元素到Grid中