Reduce the common code between the class methods

Hi guys, I need to add if condition at the beginning of all class methods. If’s true will return a default value. I would like to not repeat this if condition in each method. Any ideas?
Thank you in advance!

public myClass{

public Type Method1(){
	if(condition)
	 return default;
}

public Type Method2(){
	if(condition)
	 return default;

}

public Type Method3(){
	if(condition)
	 return default;

}
...

}

What kind of the condition is it? Is it same for all methods?

I’d need more context to help. I’d first ask- why are we calling all these methods if they all have the same condition check in them

The condition is the same for all methods. Calls a common method to check if it allows to continue.

The methods implement different logic in their body and all methods are owned in the same class. The condition needs to be added at the beginning of all methods.