public string ConcatDates()
{
var builder = new StringBuilder();
foreach (var date in Dates)
{
builder.AppendFormat(CultureInfo.CurrentCulture, ", {0}", date);
}
if (builder.Length > 0 && builder[0] == ',')
{
builder.Remove(0, 1);
builder.Remove(0, 1);
}
return builder.ToString();
}