function tracing in C#.NET

how can i trace function in C#
 
E.g:
 

Class A()
{
Button1_Click ()
{
Function A1()
}
 

Function A1()
 
{
Function B1()
}
 
Function B1()
{
Function C1()
}
 
Function C1()
{
 
}
 
}

 
How can i trace that which all functions were called when Button 1 was clicked?
 
We can use stack trace in function C1() to get all parent and child calling classes, but i need a method where all parent and child function are listed as soon as i click Button1.