FooBarAssertWithCallerMemberName.cs

private void CheckInput(int input, [CallerMemberName] string methodName = "") {
   if (input != 42) {
      throw new ArgumentOutOfRangeException(nameof(input), $"{methodName} cannot be invoked with a non-42 value");
   }
}

public void DoFoo(int input) {
   CheckInput(input);  // No longer passing in name
   
   // ...
}

public void DoBar(int input) {
   CheckInput(input); // No longer passing in name
   
   // ...
}