There is an attribute for RadioButtonLists called RepeatDirection. Change this in your .aspx page.
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<asp:RadioButtonList RepeatDirection="horizontal" runat="server" ID="rbl1">
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There is also an attribute called RepeatColumns, which will control how many columns there are until it goes to the next line.
Please give oncy c# example
This is an extremely negative attitude to have. VB.NET and C# use mostly the same objects. The only difference is syntax, and it's not that difficult to translate from one to another. There are many people here who have great knowledge and experience in VB.NET, and can help you, but you may have to do a little work and translate it yourself.