<div>
What's an example of your input?<br />
<br />
Regular expressions are sometimes overkill. &nbsp;You may be able to achieve the same result with some easier-to-understand string manipulations.
</div>


What's an example of your input?

Regular expressions are sometimes overkill.  You may be able to achieve the same result with some easier-to-understand string manipulations.

<div>
I have this code<br />
<br />
Regex re = new Regex(@&quot;^[a-zA-Z]+$&quot;);<br />
re.IsMatch(lastName))<br />
<br />

</div>


I have this code

Regex re = new Regex(@"^[a-zA-Z]+$");
re.IsMatch(lastName))



<div>
I also want<br />
<br />
min char 5<br />
max chars 20<br />
<br />
using regex
</div>


I also want

min char 5
max chars 20

using regex

<div>
<div class="content wysiwyg-content">
Hi I have this regex<br />
<br />
Regex re = new Regex(@&quot;^[a-zA-Z]+$&quot;);<br />
<br />
for firstname or lastname<br />
<br />
the issue I have is it will not except <br />
<br />
'<br />
-<br />
<br />
Can someone please change the regex so that it works with what I have already<br />
<br />
thanks
</div>
</div>


Hi I have this regex

Regex re = new Regex(@"^[a-zA-Z]+$");

for firstname or lastname

the issue I have is it will not except 

'
-

Can someone please change the regex so that it works with what I have already

thanks

How to use regex for names

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).