"please tell me
i have 2 classes in my project, which contains one method each.
how to call both of the methods in a single event.
...
instance methods."
Instance methods require instances of their respective classes - so in order to call two instance methods from different classes in the same event handler, you need to find a way to get the instances into the method.
If the instances are contained within a class (such as a form) and stored as variables, then that's easy:
public class MyForm : Form
{
private MyClass1 mc1 = new MyClass1();
private MyClass2 mc2 = new MyClass2();
...
void MyForm_Event(object sender, EventArgs e)
{
mc1.MyMethod1();
mc2.MyMethod2();
}
}
If they aren't, then it gets more complex as you have to find a way to pass the instances through (or create them in the event handler, but that means you get new instances, and it won't affect any instances outside the method)