private void сбросToolStripMenuItem_Click(object sender, EventArgs e)
 {
     direction   = Direction_enum.Unknown_direction;
     abstraction = Abstraction_enum.Unknown_abstraction;
     group       = Group_enum.Unknown_group;
     period      = Period_enum.Unknown_period;
     decision    = Decision_enum.Unknown_decision;
     Update_checking();
 }
 private void инициацияToolStripMenuItem_Click(object sender, EventArgs e)
 {
     period = Period_enum.Initiation_period;
     Update_checking();
 }
 private void стабилизацияToolStripMenuItem_Click(object sender, EventArgs e)
 {
     period = Period_enum.Stabilization_period;
     Update_checking();
 }
 private void развитиеToolStripMenuItem_Click(object sender, EventArgs e)
 {
     period = Period_enum.Development_period;
     Update_checking();
 }
 private void консервацияToolStripMenuItem_Click(object sender, EventArgs e)
 {
     period = Period_enum.Preservation_period;
     Update_checking();
 }