Can't add c# page while Create a vb project

hello
i create a new web project there is two options to code 'C#' and 'VB.Net', I choose vb.net.....everything is working fine, now i want to add new webpage but in that page i want to write code in C# i know its possible because i did same job previously....but now the problem is when i go for add new item and choose web>webpage  but there is single option to write source that is VB.net.....that is default setup when is choose new project.....
how to add C# page while choose new project in VB.net......


Thanks
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