你可以在行间添加HTML<br />.比如:
MyLabel.Text = "SomeText asdfa asd fas df asdf" + "<br />" + "Some more text";
使用StringBuilder，您可以try :
StringBuilder sb = new StringBuilder();
sb.AppendLine("Some text with line one");
sb.AppendLine("Some mpre text with line two");
MyLabel.Text = sb.ToString().Replace(Environment.NewLine, "<br />");