Clear
IMathBlockCollection.Clear 方法
从集合中删除所有元素。
public void Clear()
示例
示例：
[C#]
IMathBlockCollection blockCollection = new MathParagraph();
blockCollection.Add(new MathBlock(new MathematicalText("block1")));
blockCollection.Add(new MathBlock(new MathematicalText("block2")));
blockCollection.Clear();
