public string ReturnError()
{
if (MasterList.Contains(MasterWord))
{
return("Occurances of your keyword in the sentence:");
}
else
{
return("The sentence does not contain your keyword. Idiot.");
}
}
//I don't know how you're adding items to instances of B.
//This is purely speculative.
public void AddItem(A newItem)
{
new B().AddNewItem(newItem, x => MasterList.Contains(x));
}