/// <summary>
/// Returns an absolute <see cref="Uri"/>, based on the <paramref name="dict"/>'s
/// source.
/// </summary>
/// <param name="dict">The <see cref="ResourceDictionary"/>.</param>
/// <returns>
/// An absolute <see cref="Uri"/>, pointing to the <paramref name="dict"/>'s source.
/// </returns>
public static Uri GetAbsoluteSourceUri(this ResourceDictionary dict)
{
if (dict == null)
{
throw new ArgumentNullException(nameof(dict));
}
if (dict.Source == null)
{
throw new ArgumentException(
"The dictionaries Source property must not be null.", nameof(dict));
}
if (dict.Source.IsAbsoluteUri)
{
return(dict.Source);
}
Uri baseUri = dict.GetBaseSourceUri();
if (baseUri == null)
{
throw new ArgumentException(
"Cannot compose an absolute Uri, since no base Uri could be retrieved.");
}
return(new Uri(baseUri, dict.Source));
}
