how to align div to center of page code example

Example 1: how to put container in center of page

#container
{
    width: 400px;
    margin-left: auto;
    margin-right: auto;
}

Example 2: css align center

.center {
  margin: auto;
  width: 50%;
  border: 3px solid green;
  padding: 10px;
}

Example 3: how to center a div

margin:auto

Example 4: how to put container in center of page

div.InSkinAlignCenter {
margin: 0 auto;
}