/// <summary>
/// Creates a string representation of this object based on the format string
/// and IFormatProvider passed in.
/// If the provider is null, the CurrentCulture is used.
/// See the documentation for IFormattable for more information.
/// </summary>
/// <returns>
/// A string representation of this object.
/// </returns>
internal override string ConvertToString(string format, IFormatProvider provider)
{
string strBrush = Color.ConvertToString(format, provider);
#if !PBTCOMPILER
// We maintain a cache of strings representing well-known SolidColorBrush objects corresponding to
// each of the KnownColors. This cache is primarily intended to be passed to the localizer which
// maintains SolidColorBrush values as a string. When the localizer passes
// this string back to SolidColorBrush.SerializeOn(), we'd know which ones to
// serialize as SerializationBrushType.KnownSolidColor vs. which ones to write as
// SerializationBrushType.OtherColor.
//
// The BamlReader.GetPropertyCustomRecordId() calls ConvertToString() with format=null &&
// provider = System.Windows.Markup.TypeConverterHelper.InvariantEnglishUS, so we use that
// to decide which string objects to cache.
if ((format == null) && (provider == System.Windows.Markup.TypeConverterHelper.InvariantEnglishUS) && KnownColors.IsKnownSolidColorBrush(this))
{
lock (s_knownSolidColorBrushStringCache)
{
string strCachedBrush = null;
if (s_knownSolidColorBrushStringCache.TryGetValue(this, out strCachedBrush))
{
strBrush = strCachedBrush;
}
else
{
s_knownSolidColorBrushStringCache[this] = strBrush;
}
}
}
#endif
return(strBrush);
}