I want more than one instance of my C# program to run.
I've written a Visual Studio 2017 C# that I want to run 2 instances of. I started this as TestProject.
I tried renaming TestProject.exe to Test1Project.exe... task manager still shows it as TestProject which prevents Test2Project from running (as it is really TestProject as well).
I tried renaming the assembly name... same issue... TestProject is really running.
Thoughts?
I tried renaming TestProject.exe to Test1Project.exe... task manager still shows it as TestProject which prevents Test2Project from running (as it is really TestProject as well).
I tried renaming the assembly name... same issue... TestProject is really running.
Thoughts?
Shaun Vermaak
You need to change it in the Assembly Information dialogue box
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Correct, misread question
ps. You explicitly say C# program. If it is a VB.NET program then say so - there is a simple way to make only one instance run, maybe you have that activated.
*NO POINTS*
Exactly as Andy states, C# programs, by default, do not prevent multiple running instances. You have to manually implement the single instance logic.
By way of comparison, while VB.NET, by default does not prevent multiple running instances either; VB.NET does, however, provide an option which automatically implements the single instance logic.
-saige-
Exactly as Andy states, C# programs, by default, do not prevent multiple running instances. You have to manually implement the single instance logic.
By way of comparison, while VB.NET, by default does not prevent multiple running instances either; VB.NET does, however, provide an option which automatically implements the single instance logic.-saige-
ASKER
To make this clear, I WANT 2 instances of the program to run. When I double click Test1Project I see TestProject running in Task Manager. When I then double click Test2Project nothing happens. I wait and I wait. I then kill TestProject in Task Manager and the second iteration of the program will open... again Task Manager will show TestProject is running.
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As I said initially. With a C# program two instances WILL start and run by doing what you stated. For a C# program you have specifically added code to prevent a second instance running. remove that code and it will do what you want.
ASKER
AndyAinscow... any thoughts on why my program isn't working (as initially explained)? Once instance starts up only when the first instance is closed.
Yes I have thoughts and I have told you what they are. You have coded it to explicitly stop the second instance starting.
Paste the code in the program.cs file - that is the most likely (but not the only) place where you would have such code to prevent a second instance starting.
ASKER
I have not explicitly coded to prevent multiple instances... and I don't see the same "single instance" setting in VS 2017.
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This program, as you mentioned earlier, is a .NET program. It is also a winforms program. In the past when I have created single instance programs the second program doesn't sit idely by waiting for the first instance to close.
Just to add to this conversation, there is also no need to rename the application to support multiple instances either. Refer to my previous example for the code:
Here I have started up 4 instances (two of each one) -
And Task Manager shows -
I agree with Andy that something in your code is explicitly preventing this. We can speculate all we want, but unless you show us some code, we cannot really help.
-saige-
Here I have started up 4 instances (two of each one) -
And Task Manager shows -I agree with Andy that something in your code is explicitly preventing this. We can speculate all we want, but unless you show us some code, we cannot really help.-saige-
>>In the past when I have created single instance programs the second program doesn't sit idely by waiting for the first instance to close.
I agree, that is an unusual behaviour. Also an indication you have made a mess somewhere in your code to create that effect. To start with (a repeat) please post the code in your program.cs file.
I agree, that is an unusual behaviour. Also an indication you have made a mess somewhere in your code to create that effect. To start with (a repeat) please post the code in your program.cs file.
Somewhere there is code to prevent the second instance starting.
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Perhaps the reason that multiple instances won't run is because the program uses 2 DLLs? Is there an issue with the DLLs preventing a secondary program from opening? A "sharing" issue?