public void DisplayValidationResults(ValidationResult validationResult)
 {
     MessageBox.Show(validationResult.Errors.ToString(), "Error");
 }
 public void DisplayValidationResults(ValidationResult validationResult)
 {
     //
 }
 public void DisplayValidationResults(ValidationResult validationResult)
 {
     MessageBox.Show((string) validationResult.Errors["error"], "Error Message!");
 }