Problem with Regular Expression

See more:

C#

Hi All,

I am using a regular exression to validate numeric value in TextBox for my Windows Application in C#.Net.
This is my regular expression

private void txtNumeric_TextChanged(object sender, EventArgs e)
       {
            Regex regex = new Regex(@"^*[0-9,-]+\.?[0-9]*$");
            if (!(regex.IsMatch(txtNumeric.Text)))
            {
                txtNumeric.ResetText();
            }
        }

It is working well but the problem is, it is also accepting "-2-3-2-3".
I need my regex to accept '-' only at first position and not later.
Means '-' should be optional only at first postion.

How should i modify my regex to fulfill above condition?

Thanks and Regards,
Nagendra.