Error at making a conversor of celsius to Fahrenheint, got a lot of errors

[Jr014]

Hey guys Iam quite new at programming
I was making a conversor of Celsius to Fahrenheint , then i got a lot of errors

i don`t know if my logic is wrong or just the code

could someone help me ??

        private void button1_Click(object sender, EventArgs e)
        {
         double celsius, fare = 0;


            if (txtCelsius.Text == "") ;
                
                {
                    celsius = (Convert.ToDouble(txtFahrenheint.Text) / 1.8) + 32;
                    txtCelsius.Text = Convert.ToString(celsius);
                }
            
            else if (txtFahrenheint.Text == "");
                 {
                         fare = (Convert.ToDouble(txtCelsius.Text) * 1.8) + 32;
                         txtFahrenheint.Text = Convert.ToString(fare);
                 }

       else;
            {

                Console.WriteLine ("Valor incorreto");
            }
            

        }

[horace1]

try removing the ; from the end of the statements

if (txtCelsius.Text == "") ;

and

             else if (txtFahrenheint.Text == "");

and

       else;