please, help

[theda]

this is agood code i took it from this site, but when i use power sign it give me error
I want to know how i can use power expression "^",i write this code but it dosen`t woke( .Replace("^", " pow ") )

private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(Evaluate(textBox1.Text.Replace("x" ,textBox2.Text)).ToString());
}

public static double Evaluate(string expression)
{
return (double)new System.Xml.XPath.XPathDocument
(new StringReader("<r/>")).CreateNavigator().Evaluate
(string.Format("number({0})", new
System.Text.RegularExpressions.Regex(@"([\+\-])")
.Replace(expression, " ${1} ")
.Replace("/", " div ")

[theda]

please,
can you send me if you find any solution.
e-mails:<removed>

[Plater]

What do you mean by "doesn't work"?
It doesn't find any instances of "^" to replace with " pow"?
It throws some kind of error?
Are you sure the character set is the same? (ASCII or utf8 or some other?)

[theda]

first i wanna to thank u plater for ur reply
about code i found this code like this
all i want code when user
write any equations like this "(x^2+x)/(x*x)"
in text box 1
and write the value "x" in text box 2 , he has the value of this equation in message box when he press ok.
please, help me to get this code
and thank u again.

[Plater]

Just google a calculator program for .NET, it will already be created for you.

[theda]

yes, but i want a code in c# .

[Plater]

yes, but i want a code in c# .

Just google a calculator program for C# then.

They've been around for years.