WPF Validation Manually Adding Errors into Validation.Errors Collection

Question

Is there any way to manually/dynamically add errors to the Validation.Errors collection?

Answer 1

from http://www.wpftutorial.net/ValidationErrorByCode.html

ValidationError validationError = new ValidationError(regexValidationRule, 
    textBox.GetBindingExpression(TextBox.TextProperty));

validationError.ErrorContent = "This is not a valid e-mail address";

Validation.MarkInvalid(
    textBox.GetBindingExpression(TextBox.TextProperty), 
    validationError);