css center text vertically and horizontally within a div

Center text vertically and horizontal within a div without wrapping the text. Making the line-height equals to the div height and set the vertial-align to middle.
[code language=”css”]
.center {
width: 100px;
height: 100px;
text-align: center;
vertical-align: middle;
line-height: 100px;
font-size:50px;
}
[/code]