Use of static Method

Most of the case you use static class like when your module required Utiliti/helper class where some peace of code is common and you want to move in common places, e.g. xmlhelper static class which contain static methods to get element, get attribute such methods. which are very common and can be called from multiple classes.

 

defination of static :

The static modifier makes an item non-instantiable, it means the static item cannot be instantiated. If the static modifier is applied to a class then that class cannot be instantiated using the new keyword. If the static modifier is applied to a variable, method or property of class then they can be accessed without creating an object of the class, just use className.propertyName, className.methodName.