can u give me example on calling function and called function

private void Form2_Load(object sender, EventArgs e)
{
MsgBox();
}

private void MsgBox()
{
MessageBox.Show("Test");
}

If you need to know about what is function/method in C# and how to call a method check this tutorial[^]

I'm adding another resource related to C# methods. Check this[^]

And it is better if you can read about Anonymous Functions in C#[^]

// table.cpp
// demonstrates simple function
#include <iostream>
using namespace std;
void starline(); //function declaration
// (prototype)
int main()
{
starline(); //call to function
cout << “Data type Range” << endl;
starline(); //call to function
cout << “char -128 to 127” << endl
<< “short -32,768 to 32,767” << endl
<< “int System dependent” << endl
<< “long -2,147,483,648 to 2,147,483,647” << endl;
starline(); //call to function
return 0;
}
//--------------------------------------------------------------
// starline()
// function definition
void starline() //function declarator
{
for(int j=0; j<45; j++) //function body
cout << ‘*’;
cout << endl;
}
The output from the program looks like this:
*********************************************
Data type Range
*********************************************
char -128 to 127
short -32,768 to 32,767
int System dependent
long -2,147,483,648 to 2,147,483,647
*********************************************
The program consists of two functions: main() and starline(). You’ve already seen many programs that use main() alone. What other components are necessary to add a function to the program? There are three: the function declaration, the calls to the function, and the function definition.