RegularExpression Validator (Regex) to check whether string has Dot and Hyphen ASP.Net

Here I have created sample that full-fill your requirement using RegularExpressionValidatior.

HTML

<div>
    Name :
    <asp:TextBox ID="txtName" runat="server" />
    <asp:RegularExpressionValidator runat="server" ControlToValidate="txtName" ValidationExpression="^([a-zA-Z]+)[.]\s?([a-zA-Z]+)[-]([a-zA-Z]+)$"
        ErrorMessage="Invalid Name Format" ForeColor="Red"></asp:RegularExpressionValidator>
</div>

Screenshot