public string this[string columnName]
{
get
{
var error = string.Empty;
ValidatedProperties[columnName] = columnName switch
{
nameof(Username) => Username.IsValidUsername(ref error),
nameof(DisplayName) => DisplayName.IsValidDisplayName(ref error),
nameof(Email) => Email.IsValidEmail(ref error),
nameof(Password) => Password.IsValidPassword(ref error),
_ => true
};
return(error);
}
}
}
