Guess the number C#

Question

Hi. I am pretty new to C# and trying to get this game to work. I got a textbox where I type the number that I have in mind and the computer must guess it using bisection algorithm but I don't understand why the loop won't work since  the condition is true. Here's my code. The biggeest and the minimum have their values set to "0" and "100".

 

private void btnGuess_Click(object sender, EventArgs e)

{

bool guess = true;

Convert.ToInt32(txtNumber.Text);

nrToGuess = int.Parse(txtNumber.Text);

DialogResult dialogResult;

 

do

{

average = minimum + biggest / 2;

dialogResult= MessageBox.Show("Is your number" + " " + average+ " ? ", "Question", MessageBoxButtons.YesNo);

if (dialogResult== DialogResult.No && average > nrToGuess)

{

biggest = average;

average = biggest + minimum / 2;

}

else if (dialogResult == DialogResult.No && average < nrToGuess)

{

minimum = average;

average = biggest + minimum / 2;

}

else if (dialogResult == DialogResult.Yes)

{

dialogResult=MessageBox.Show("Congratulations! You guessed the number!");

break;

}

else

{

Application.Exit();

}

}

while (guess);

 

I would really appreciate any help given. Thank you very much!