namespace MedicalView.Visits { public partial class FormMain : Form { public FormMain() { InitializeComponent(); } private void FormMain_Load(object sender, EventArgs e) { } private void DiagnosesToolStripMenuItem_Click(object sender, EventArgs e) { var service = Program.ServiceProvider?.GetService(typeof(FormDiagnoses)); if (service is FormDiagnoses form) { form.ShowDialog(); } } } }