Check this in Menu Click of that form
if (IsFormAlreadyLoaded("frmTest") == true)
{ return; }
private bool IsFormAlreadyLoaded(string formToLoadName)
{
foreach (Form frmChild in this.MdiChildren)
{
if (frmChild.Name == formToLoadName)
{ frmChild.Activate(); return true; }
}
return false;
}
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