Has the keyword static.
• A Static function is one that can be accessed without creating an object of the class.
• It can be accessed using the name of the class.
• It can belong to Static as well as Non-Static classes.
• One cannot use external Non-Static objects and functions inside a Static method.
• One can use Static function in Static as well as Non-Static classes.
• Keyword this is not supported.
• Example of one inbuilt Static function in C# is Convert.ToString().
Example:
public class A{
public static void C() {
//Invalid
this.D();
}
public void D()
{ //Valid
C();
}
}
Non-Static class
• Does not have the keyword static.
• Can be instantiated and object can be created.
• Keyword new is supported.
• Objects and Functions cannot be accessed by class name unless marked static.
• Not mandatory for functions and methods to be marked static i.e. can contain Static as well as Non-Static members.
• Non-Static members can be accessed using this keyword. But Static members cannot be accessed using this keyword.
• Multiple instances can be created.
Example:
public class A
{
public object C;
public static object G;
public static void D()
{ //Invalid
var p = C;
//Valid
var q = G;
//Invalid
E();
}
}
