///<summary>
///Gets or sets the element with the specified key.
///</summary>
///
///<returns>
///The element with the specified key.
///</returns>
///
///<param name="key">The key of the element to get or set.</param>
///<exception cref="T:System.NotSupportedException">The property is set and the <see cref="T:System.Collections.Generic.IDictionary`2"></see> is read-only.</exception>
///<exception cref="T:System.ArgumentNullException">key is null.</exception>
///<exception cref="T:System.Collections.Generic.KeyNotFoundException">The property is retrieved and key is not found.</exception>
public object this[string key]
{
get { return(innerDictionary[key]); }
set
{
innerDictionary[key] = value;
if (ownerTheme != null)
{
ThemeResolutionService.RaiseThemeChanged(this.ownerTheme.ThemeName);
}
}
}