make singleton class in c# Unity code example

Example 1: singleton unity

public class Example
{
public static Example Instance{get; private set;}

void awake()
{
if(Instance == null)
{
Instance = this;
DontDestroyOnLoad(gameObject);
} else
{
Destroy(gameObject);
}
}

}

Example 2: how to make a singleton in unity

void Awake()
 {
   if (instance == null)
     instance = this;
   else if (instance != this)
     Destroy(gameObject);
 }