Set Collections for C#

.treeDiv 
{
    font-family: verdana;
    font-size: 70.5%;
    font-weight: normal;
    background-color: #f1f1f1;
    color: Black;
    overflow: auto;
    margin: 0px 0px 0px 0px;
    padding: 0px 0px 0px 0px;
}

.treeNode 
{
    white-space: nowrap;
    text-indent: -14px;
    margin: 5px 2px 5px 14px;
}
A.treeUnselected:hover, A.treeSelected:hover 
{
    text-decoration: underline;
    background-color: #cccccc;
    border: solid 1px #999999;
    text-decoration: none;
}
A.treeUnselected, A.treeSelected
{
	color: Black;
	padding: 1px 3px 1px 3px;
    text-decoration: none;
}
A.treeSelected
{
	background-color: #ffffff;
    border: solid 1px #999999;
}
A.treeUnselected 
{
	border: solid 1px f0f0f0;
    background-color: transparent;
}
.treeSubnodes
{
	display: block;
}
.treeSubnodesHidden
{
	display: none;
}
.treeNode IMG.treeNoLinkImage, .treeNode IMG.treeLinkImage
{
	width: 9px;
	height: 9px;
	margin-left: 5px;
	margin-right: 0px;
}
.treeNode IMG.treeLinkImage
{
    cursor: pointer;
}