I\'m using dapper for a mvc3 project at work, and I like it. However, how are you supposed to layer the application when using dapper? Currently I just have all my sql stuffed d
Though this question is now considerably aged, I'd like to further suggest the external storage of SQL. Visual Studio (at least 2015+) has syntax highlighting, as well as a small debugger and connection manager for *.sql files. The files can further be marked as Embedded Resources and completely contained within the assembly, but separate from your code. You'll grow to loathe seeing colorless SQL embedded in non-syntax-verified strings.
I've adopted this pattern on all of my recent projects, and combined with an ORM like Dapper, the interfacing between C# and SQL becomes very minimal. I have an open-source project extending Dapper available on GitHub which can provide examples, as well as a NuGet Package. It also includes a moustache inspired string replacement engine, which is useful for templating your scripts to make them reusable, or inserting dynamic filtering conditions.