Answer

NullReferExceptionの回避方法は?

1: Sub Main() 2: Dim StringTool As New MyClass.Str 3: 4: Console.WriteLine(StringTool.MidB("string", 2, 2).ToString) 5: Console.WriteLine(StringTool.LenB("てすとですが。").ToString) 6: Console.WriteLine("finished") 7: 8: End Sub Newが抜け…