how to recognize that process is running in c #

I am coding with C# and need to know how to prevent my new.exe executable from running if my "current.exe" process is currently running.  For instance, if current.exe is running and I click on my new.exe to run an info message displays and informs that current.exe is currently running, if it is not currently running my new.exe launches.

I know I have to do an if event:

if {current.exe is running} display message
else open up new.exe or return;

thank you
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systems_axAsked:
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SaedSalmanCommented:
About 6 lines of code,

here is how to Get a List of Running Processes in C#:
http://www.howtogeek.com/howto/programming/get-a-list-of-running-processes-in-c/

How to get the Process Name in C#
http://www.csharpfriends.com/Forums/ShowPost.aspx?PostID=17937

C# : Get the all running processes and applications
http://www.eggheadcafe.com/tutorials/aspnet/cb972d77-0892-4bf7-834d-c23b6dd5c03a/c--get-the-all-running.aspx
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mrjoltcolaCommented:
Try this:
    using System.Diagnostics;
 
    Process aProcess = Process.GetCurrentProcess();
    string aProcName = aProcess.ProcessName;
			
    if (Process.GetProcessesByName(aProcName).Length > 1)
    {
        Application.ExitThread();
    }

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HarryNSCommented:
System.Diagnostics.Process.GetProcessesByName("Current")
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systems_axAuthor Commented:
thanks,
I have the following anf nothing happens when I run outlook and click on the button that contains the following code: any ideas???

private void button4_Click(object sender, EventArgs e)
        {
            Process OUTLOOK= Process.GetCurrentProcess();
            string aProcName = OUTLOOK.ProcessName;

            if (Process.GetProcessesByName("OUTLOOK.exe").Length > 1)
            {
                MessageBox.Show("Close OUTLOOK first.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

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systems_axAuthor Commented:
i fixed it,works great, thanks so much
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mrjoltcolaCommented:
Great! Can you post the fix to your code, for the sake of the solution for others? Thanks.
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systems_axAuthor Commented:
sure, it is:

private void button4_Click(object sender, EventArgs e)
        {
            Process OUTLOOK= Process.GetCurrentProcess();
            string aProcName = OUTLOOK.ProcessName;

            if (Process.GetProcessesByName("OUTLOOK").Length > 0)
            {
                MessageBox.Show("Close OUTLOOK first.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
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systems_axAuthor Commented:
i'll be posting another ? about another function I am not familiar with
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