public static string GetDisplayString(this ISymbol symbol)
{
var specialType = symbol.As <ITypeSymbol>()?.SpecialType;
bool isSpecialType = specialType.GetValueOrDefault(SpecialType.None) != SpecialType.None;
return(isSpecialType ? symbol.ToDisplayString(DisplayFormats.QualifiedNameDisplayFormat) : symbol.ToDisplayString(DisplayFormats.GetDisplayFormat(symbol.Language)));
}