C#怎么过滤掉html标签的样式表
比如:<h1 id=artibodytitle style="border-top-width: 0px; padding-right: 0px; overflow-y: hidden; padding-left: 0px; font-weight: normal; border-left-width: 0px; font-size: 20px; overflow-x: hidden; padding-bottom: 0px; margin: 0px; color: rgb(3,0,92); line-height: 35px; padding-top: 0px; border-bottom: rgb(200,216,242) 1px solid; font-family: 黑体; height: 35px; text-align: center; border-right-width: 0px" fid="1" did="704149" tid="1" pid="27">日购岛后针对中国飞机紧急起飞次数增3.6倍</h1>
我只想不留<h1>日购岛后针对中国飞机紧急起飞次数增3.6倍</h1>