static async Task<string> _j(IA a)
{
try
{
WriteLine($"[{Environment.CurrentManagedThreadId}] _j-0");
Task<string> task = a.GetString();
WriteLine($"[{Environment.CurrentManagedThreadId}] _j-1");
string result = await task;
WriteLine($"[{Environment.CurrentManagedThreadId}] _j-2");
return result;
}
finally
{
WriteLine($"[{Environment.CurrentManagedThreadId}] _j-3");
}
}