Virtual Chatbox in C#

Question

Hi, I'm creating a virtual chatbox in c# which does not need any internet to function

Here's the code:
private void button1_Click(object sender, EventArgs e)
{
SendMessage();
}
private void SendMessage()
{

            listBox1.Items.Add(textBox1.Text);
            label1.Text = textBox1.Text;
            textBox1.Text = "";

            if (label1.Text.Contains("Help"))
            {
                listBox1.Items.Add("Here are some help topics:");
                label1.Text = "";
            }
            else
            {
                listBox1.Items.Add("I'm sorry, I can't help with that");
                label1.Text = "";
            }
        }

But this line
if (label1.Text.Contains("Help"))
{
listBox1.Items.Add("Here are some help topics:");
label1.Text = "";
}
works only if "Help" is there in the textbox. It doesn't accept "help". How to make it ignore the case?

Answer 1

Try switching this line:

if (label1.Text.Contains("Help"))

To:

if (label1.Text.ToUpper().Contains("Help".ToUpper()))

Answer 2

> It doesn't accept "help". How to make it ignore the case?

See the Remarks at String.Contains with StringComparison