Need convenience API to write strings & buffered response to body

[yishaigalatzer]

Right now when trying to write strings to the output, there is lots of user code required to account for computing content-length, dealing with encoding etc.

The responsibility for this shouldn't be in MVC or user code, as its very error prone and repetitive code.

I realize this might belong in a helper library and not in abstractions, but we don't have that library anywhere I'm aware of.

[Tratcher]

Such a helper would write the entire response in one call, and would have to set:
Content-Length
Content-Type with charset (assume utf8?)

SendResponse(string body, Encoding enc, string contentType)

[yishaigalatzer]

assume utf-8 without BOM?

[glennc]

SIgnalR needs the same method.

We should have Microsoft.AspNet.HttpExtensions with:
End(byte[] body, string contentType = "text/plain")
Plus all the other overloads.