Action`4 Delegate

Encapsulates a method that has four parameters and does not return a value.
T1
The type of the first parameter of the method that this delegate encapsulates.
T2
The type of the second parameter of the method that this delegate encapsulates.
T3
The type of the third parameter of the method that this delegate encapsulates.
T4
The type of the fourth parameter of the method that this delegate encapsulates.