Variable not holding value?

Why do dots always print when the bool value should be set to true after one dot?

Code:

---

private void do3()
                {
                        if(TorF(TB1.Text))
                        RTB2.Text=TB1.Text;
                }
        bool check2=false;
                public bool TorF(string str)
                {
                        char[] chr = str.ToCharArray();
                       
           
                        foreach (char dummy in chr)
                        {
                                if (char.IsDigit(dummy)) return true;
                                else if (dummy=='.'&& check2==false) {check2=true; return true;}
                        }
                        return false;
                }

---

What are you trying to do? with the method?

I am just practicing right now.

This should not execute if check2 is true:

else if (dummy=='.' && check2==false) {check2=true; return true;}

But for some reason the dots always print. I only want one dot to print and I can't figure out why that does not work right.

Can you show us the input to the method?
I think your logic might be off a little bit.