public Completion Execute(ExecutionEnvironment environment)
{
ExecutionEnterEventArgs args = new ExecutionEnterEventArgs(this);
environment.FireEnterNode(args);
try
{
var c = this.ExecuteImpl(environment);
environment.FireLeaveNode(new ExecutionLeaveEventArgs(this, c));
return(c);
}
catch (Exception e)
{
environment.FireLeaveNode(new ExecutionLeaveEventArgs(this, Completion.Exception(e.Message, this)));
return(Completion.Exception(e.Message, this));
}
}