Q:

how to enter only character in Regex - C#?

i have textbox and i need to check if he contain only character 
how to do it with Regex in C# ?
thank's in advance

A:

The normal way to do that would be ^.$.
This means only one character between the start and end anchors.
Feel free to change . to any other limitation to suit your purposes.
And keep in mind, there may be other ways to do what you want. For example, if it's a WPF TextBox, you can set properties on the text box itself that will restrict lengths without you having to worry about regexes.

