Question

i’d like to know if it is possible to implement own language constructs (like lock or foreach) in C#?

The idea behind is that i want to mark start and end of a block of operations.
instead of writing

startblock("blockname");
  blabla();
  andsoon();
endblock();

i’d like to write something like

block("blockname"){
  blabla();
  test();
}

thank you!

Answer 1

For which purpose do you need it? Just for clarity of writing and clean code?
C# is not extensible language.
With using you can achieve that nicely:

using (new Context("block name"))
{
    // do your staff here
}

class Context : IDisposable
{
    public Context(string name)
    {
        // init context
    }

    public void Dispose()
    {
        // finish work in context
    }
}