I've submitted data on the ODK central server. I would like to download the submissin data on my machine using asp.net c#. Could anyone please help me?
I don't have experience with C#, but an option is to take the pure http examples from the API docs and implement them in C#. A quick web search came up with https://docs.microsoft.com/en-us/dotnet/csharp/tutorials/console-webapiclient
Then you'll want to inspect the form schema, post-process the data according to the data types, and handle media attachments.
Take a look at the source code for ruODK tonget a feel for what's involved.
Core team: do the apiary API docs support C# examples? (R would be ace, too)