/// <summary>
/// Set attribute value.
/// </summary>
/// <param name="Key">Attribute key.</param>
/// <param name="Value">string value.</param>
public void SetAttr(string Key, string Value)
{
if (!mAttributes.ContainsKey(Key))
{
AddAttribute(Key, Value);
}
else
{
mAttributes.SetValue(Key, Value);
}
}