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Try this instead, it should do what you want:<br />
<br />
Regex regex = new Regex(&quot;^[a-zA-Z0-9.]+$&quot;);<br />
<br />
<br />

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Try this instead, it should do what you want:

Regex regex = new Regex("^[a-zA-Z0-9.]+$");




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Regex regex = new Regex(&quot;[a-zA-Z0-9.]+&quot;);<br />

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Regex regex = new Regex("[a-zA-Z0-9.]+");


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I'm missing something here, &nbsp;I only want to allow alphanumeric characters and the period. &nbsp;i have the following code<br />
<br />
Regex regex = new Regex(&quot;[^[a-z][A-Z][0-9].]<wbr />&quot;);<br />
if(regex.IsMatch(txtName.T<wbr />ext) == true)<br />
<br />
Do I need a carrot before each of those sub groups? &nbsp;<br />
<br />
(the code is not working properly).
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I'm missing something here,  I only want to allow alphanumeric characters and the period.  i have the following code

Regex regex = new Regex("[^[a-z][A-Z][0-9].]");
if(regex.IsMatch(txtName.Text) == true)

Do I need a carrot before each of those sub groups?  

(the code is not working properly).

URGENT: Easy Regex Question

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).