public string Validate(string propertyName)
{
string result = string.Empty;
switch (propertyName)
{
case nameof(PlaceName):
if (string.IsNullOrWhiteSpace(PlaceName) || !PlaceName.ValidateFileName())
{
result = "Invalid filename.";
}
else if (File.Exists(GetPath()))
{
result = "A place with that name already exists.";
}
break;
}
return(result);
}
