Software development

Controls have different default values for the HorizontalContentAlignment and VerticalContentAlignment properties. Default values for HorizontalContentAlignment / VerticalContentAlignment for the most common controls are listed below. Button – Center, Center Calendar – Left, Top CheckBox – Left, Top ComboBox – Left, Top ContextMenu – Left, Center DataGrid – Left, Top DatePicker – Stretch, Top Expander – Stretch, Stretch GroupBox – Left, Top Label – Left, Top ListBox – Left, Center Menu – Left, Top PasswordBox – Left, Top ProgressBar – Left, Top RadioButton – Left, Top RepeatButton – Center, Center RichTextBox – Left, Top Slider – Left, Top StatusBar – Left, Top TabControl – Center, Center TextBox – Left, Top TreeView – Left, Center

Namespaces in C# are used to organize classes.To access the class of a namespace, we need to use namespacename.classname. namespace is designed for providing a way to keep one set of names separate from another. The class names declared in one namespace does not conflict with the same class names declared in another. To define a namespace we need to use "namespace". eg.   namespace NamespaceName  {       class className      {      }  }   namespace WpfWorld Namespace  {       class WpfWorld      {      }  } if we want to use  WpfWorld class in another class then we have to add  WpfWorld Namespace to that class by using Keyword. using  WpfWorld Namespace;   namespace Ex Namespace  {       class Ex      {        var obj WpfWorld = new  WpfWorld();      }  }

Sealed class is a class that prevents the class from being inherited by other class.Sealed class can have Sealed Methods.Sealed method can't be override.To create a Sealed class we need to add Sealed modifier before class keywords. eg. sealed class MySealedClass { } Sealed class can be a derived class but can't be a base class.A sealed class cannot be an abstract class. Because abstract class has to provide functionality and here we are restricting it to inherit. One of the best usage of sealed classes is when you have a class with static members.