string sal = txtSalary.Text; Regex regexSal = new Regex(@"/^\d{1,9}(?:\.\d{0,2})?$/"); Match matchSal = regexSal.Match(sal);
^\d{1,9}
\.
\d{2}$
^\d{1,9}\.\d{2}$
@"^\d{1,9}\.\d{2}$"
var
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