将文本框的高度设置为标签文本的高度

Can someone provide me an example of how I can set the height of my textbox to fit the height of a label that accompanies it? As you can see, I have my label and textbox within a fieldset. The text for my label can be variable so I'm unsure if there are css properties to handle this or it must be set it dynamically. I should also mention that my labels are populated on the fly when the page loads. I'm using Asp.net.Can someone provide me an example of how I can