Cs close opened form when reopened

// Look through all open forms to see if there is already a Form2 open.
// If it is, Close it. This prevents the user from (purposely) having 5 of the same forms open.
// If you try to cycle through open forms after closing one, it crashes, 
//     because it edits the list of forms while cycling through it
// This is why it is converted into a list of forms first.
foreach (Form frm in Application.OpenForms.Cast<Form>().ToList())
{
    if (frm.Name == "Form2")
    {
        frm.Close();
    }
}

Similar codes

0 vote120 views1 answer
Quine in c#
C#
0 vote120 views1 answer
Select every second row in html table
C#
1 vote126 views2 answers
Should i learn c #
C#
0 vote134 views1 answer
Mysqldump - date
C#
0 vote112 views2 answers
C# if combobox selected index
C#
1 vote113 views1 answer
How to parent something unity
C#
0 vote123 views1 answer
Creating a streamwiter file C#
C#
0 vote112 views1 answer
Web client ignore ssl error
C#
4 votes121 views3 answers
Sum of digit of number c#
C#
0 vote115 views1 answer
Webbrowser control feature_browser_emulation compatible
C#