Convert first letter in a string to capital

I have a Text Box, (say txtBox1) which I am asking the user to enter some text in.
I need to check if the first letter in the box's text is uppercase.
If not uppercase convert ONLY the first letter to uppercase and keep the remaining letters as lowercase.

Thank you
adamtraskAsked:
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dustockCommented:
There might be more efficient ways to do this, but this will give you the result your looking for.  In the Leave event for your text box drop in this line of code.

        private void textBox1_Leave(object sender, EventArgs e)
        {
            textBox1.Text = textBox1.Text[0].ToString().ToUpper() + textBox1.Text.Substring(1);
        }

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adamtraskAuthor Commented:
Thank you. This partly works as it changes the first letter to uppercase, but if the user enters an uppercase letter in the middle of the word like "adAm"? It would become AdAm!

Is there a way to convert the rest of the text to lowercase?

Thanks
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dustockCommented:
Yeah, not a problem, you just need to add a .ToLower() to the second part like below.

textBox1.Text = textBox1.Text[0].ToString().ToUpper() + textBox1.Text.Substring(1).ToLower();

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adamtraskAuthor Commented:
Thank you so much.
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dustockCommented:
No problem, glad I could help.
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