FooBar.cs

public void DoFoo(int input) {
   if (input != 42) {
      throw new ArgumentOutOfRangeException(nameof(input), "DoFoo cannot be invoked with a non-42 value");
   }
   
   // ...
}

public void DoBar(int input) {
   if (input != 42) {
      throw new ArgumentOutOfRangeException(nameof(input), "DoBar cannot be invoked with a non-42 value");
   }
   
   // ...
}