Expert C# developer needed

We are looking for a highly experianced and professional developer to work on a C# .NET ASPX website. The site is an existing site and we need the developer to add new modules. A successful candidate will need to have a portfolio of work in .NET that we can review and this portfolio must display a high standard of work. They will also need to have a good GAF feedback rating so far. This is an urgent project and we need someone to start immediatly on a project that is estimated to last a week and then work ongoing. A high standard of english is preferred - After the initial project the work will be adhoc but is expected to be fairly frequent and may also include other work on other projects. Please quote your required hourly rate and a guideline for a weeks work.