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how to set image in Visual Studio C# Windows Forms with Image.FromFile

So I'm trying to set a custom image for a form application I've made. The images I'm trying to target are in a folder called "Images" on the same level as my Solution file. The solution file is a C# windows forms (net core framework) solution. It's a basic form app that I want to display an image based on a users selection, however right now I get an unhandled exception everytime I try to set the image with this code:
picFood.Image = Image.FromFile("../../Images/burger.jpg");
The exact error is "System.IO.FileNotFoundException: ../../Images/burger.jpg"
In another totally unrelated solution this works. Folder structure is the same. A folder called Images, on the same directory level as the .sln file holds the images there. They're in my solution explorer and everything. I've tried this with one "../" and no "../" as well so I'm not sure what to do from here.

Files with relative paths are opened relative to the working directory of your application.
In this case, when launching from within Visual Studio, the default is the bin folder where the compiled application is put by default.
So if your binary is in <project dir>/bin/Debug/App.exe this path will resolve to <project dir>/Image/burger.jpg.
If you have changed something in your build configuration, or your application switches directory at runtime (e.g. via Directory.SetCurrentDirectory), this path may be different than you expect.
To understand your issue, I suggest you start looking at what your working directory is. You can obtain that in your code via Directory.GetCurrentDirectory().
You can also resolve your relative path using Path.GetFullPath.
Print these two values to see where your program attempts to load the file from.
Keep in mind that any image files you put in the solution/project folder will need to be copied with your binary if you want to use them.
To use relative paths without .. you can copy them alongside your binary during compilation, see:
VS2010 How to include files in project, to copy them to build output directory automatically during build or publish and Copying Visual Studio project file(s) to output directory during build for how to do that.

How to create text file in .NET project folder, not in bin/Debug folder where is by default

I have a very simple .NET console application in Visual Studio. I am trying to write some words into a text file.
using (StreamWriter file = File.AppendText("log1.txt"))
{
file.WriteLine("Hello from the text file");
}
If the file does not exist, the application creates it in the autogenerated folder bin/Debug.
Is there a way to create this file in the project's directory, where I have .csproj file?
And more important, in real-world applications, when you work with files, you keep them in bin/Debug? That's why .NET creates them there firstly?

Is there a way to create this file in the project's directory, where I have .csproj file?
Yes, but this can only be done while you are working on your project. Once you are done developing it and try to publish it you won't have access to the location where you have .csproj file, because after publishing you can install it on any PC and it wont have the project you are working on.
And more important, in real-world applications, when you work with files, you keep them in bin/Debug?
No, I assume by real-world applications in your context you mean a published project '.exe' that you can run on any PC. Windows provides you three Data folders that you should use when writing your program so that it works smoothly after publishing:
User Data
Roaming User Data
All User Data
You can acess the above folders in .NET application using the Environment.SpecialFolder:
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData)
As per your given code, try this :
var fileName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
"log1.txt");
using (StreamWriter file = File.AppendText(fileName))
{
file.WriteLine("Hello from the text file");
}
This way you will be able to publish your program and it will still work smoothly without hard-coding the path as you were doing previously.
That's why .NET creates them there firstly?
If you don't specify a complete path, and just the file name .NET looks into the working directory of the executable, which in this case is bin/Debug

Is there a way to create this file in the project's directory, where I have .csproj file?
Yes. As explained here (second answer) you can use the post-build event to write down the value of $(ProjectDir) in a text file (using command echo $(ProjectDir) > ..\..\projectdir.txt). This macro contains the directory of your .csproj. This command will create the file projectdir.txt with your project directory after a build process so you read this file contents in your code and use what is inside it to pass to File.AppendText as the base directory to create your file log1.txt.
And more important, in real-world applications, when you work with files, you keep them in bin/Debug? That's why .NET creates them there firstly?
That depends on what you want to do. In your case the code creates the file at bin/Debug because that is where your executable are being executed. When you omit the full path to File.AppendText and just pass "log1.txt" as argument, it will create the file in the same folder as the executable are at. If you want a different folder you should specify the folder here (e.g. File.AppendText("C:/log1.txt") will create the file at C:/.

You can create the text file in the root of your project and use copy always to have them in the same place as your executable. If this is just a readonly text file then it's OK because windows doesn't allow you to modify the files reside in Programs folder in OS drive.
If you want your code to modify these text file then you need to put them in appdata folder. In real world example I did this on many project. All the database work my winforms, WPF application need goes in AppData folder.

Finding a specific file path when two files have the same name in different locations in C#

I'm trying to load and save an xml file called Modules.xml in my code. I have currently got the file path hardcoded as shown below. I am trying to get the file path within my code without it being hardcoded.
I have tried using Path.GetDirectoryName and new FileInfo("Modules.xml").Directory.FullName. However, both of these target the file in my debug folder, when the file I need is in the main solution folder.
Is there a way to target the file in my main solution folder instead of my debug folder? (both files are called Modules.xml)
doc.Save("C:\\Users\\Matthew\\Desktop\\Year4\\Object Oriented\\Project1\\Project1\\Modules.xml");
Both file locations are shown below:
C:\Users\Matthew\Desktop\Year4\Object Oriented\Project1\Project1\Modules.xml
^^^this is the file path I need for my code^^^
C:\Users\Matthew\Desktop\Year4\Object Oriented\Project1\Project1\bin\Debug\Modules.xml

The best approach here would be to use a configuration file, e.g. app.config, for storing such a string. Then you can change file path without recompiling the code, and your file can be stored in any location accessible by application.
If you really want to access your file the way you explained, AppDomain.CurrentDomain.BaseDirectory will provide you with the bin/Debug location in runtime. Then you can find a relative path from there like:
Path.Combine(AppDomain.CurrentDomain.BaseDirectory, #"..\..\", fileName);
where fileName is "Modules.xml" for example.

I have tried using Path.GetDirectoryName and new
FileInfo("Modules.xml").Directory.FullName. However, both of these
target the file in my debug folder, when the file I need is in the
main solution folder.
That's because bin\Debug is your working directory when you start and run the project. To change that, you can set the working directory environment variable to point to your solution directory (instead of bin\debug|release) which I wouldn't recommend that. Because when you finally endup with development, and release the application, there wouldn't be any solution directory that holds your XML file. What I can suggest is to copy your XML file to the output folder. Either you are in development (debug) or production (release) mode, the XML always going to be copied to final directory. And you can access the working directory with something like AppDomain.CurrentDomain.BaseDirectory. To enabling copy XML to output directory, right-click on it, choose Properties, set Build Action to None, and set Copy to Output Directory to Copy Always or Copy if newer. You're good to go now.

How to copy non-code files with the compiled project when referenced by another project in C#

I have a project that acts as wrapper for a 3rd party .exe (it has static methods to create the command line and run the executable). I want to use it in at least a couple of projects in my solution. Ideally, the .exe should only be in that wrapper project (I don't want to have to add it to each project that uses it). Right now I'm trying to get this to work with a web project (.NET MVC) running on IIS 7 but when I use Assembly.GetExecutingAssembly().Location to see the directory that my wrapper is called from I'm in a folder like
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET
Files\"my
project"\65a016fb\ac5f20a7\assembly\dl3\d8de0f10\06e277a2_55b2cd01
and my 3rd party .exe is nowhere to be found. Is it possible to copy files with a reference that do not compile?
Btw, I have set the "Copy to output directory" and "Build Action" properties of my .exe to "Copy always" and "Content"/"Resource"/"Embedded Resource" without success so far.

Try to add an existing files in your projects which use your wrapper. When the dialog box appears, do this:
http://wiki.oxygenelanguage.com/en-w/images/0/0d/AddAsLinkAero.png
Either that or drag neccessary files to your projects from the wrapped with Alt holded.
That will add the files as links. Links are good choice for reusal whenever the original files has to be located in the only place.
Adding files as links in conjunction with setting to that links build action to Content and Copy always to the option of copying them to the output directory should work for your.

If anyone runs into this problem, here's how I got around it:
Add the .exe to your project's resources (right-click on the project,
Properties -> Resources, add file and give it a resource name)
You may now access your .exe as a byte[] (at least if you're building to a dll)
with Properties.Resources.*NameYouGaveYourResource*
Before using your .exe, use File.Exists() to check if the file exists in Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) (or you can put the exe wherever you want using the method, above gets you directory the .dll is in) - if not, write out the file:
using (FileStream fileStream = new FileStream(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "\EXE.exe", FileMode.CreateNew)) {
fileStream.Write(Properties.Resources.NameYouGaveYourResource, 0, > Properties.Resources.NameYouGaveYourResource.Length);
}
Now you can use the exe easily as a Process. Pretty far from ideal, but it means the exe accompanies your .dll wherever it goes.

Application Executable Path C#

I've added an executable to my Visual Studio 2010 C# Solution. In the properties of this executable, the executable path is a full path ("C:\Test\MyProgram\MyProgram.exe")
When I deploy my solution (with installshield) on a new PC, the executable is part of the deployed solution together with some source files and the solution file. So far so good.
But when I open the installed solution file (in Visual Studio 2010),
I'm not able to build it because It can't find the executable in the specified path:
("C:\Test\MyProgram\").
Here is the question: How can change the full path of the executable, so it gets the path of where the solution is installed on the new PC. Something like :
"[InstallDir]\MyProgram.exe"
Thanks
Update: I found out that you can use relative path in Application's Executable path. Thanks for all your answers.

You could use TargetDir property

I am just thinking off the top of my head here. There may be a much simpler way. I'm thinking you might want to create a Custom Action that runs at the end of your installer that manually opens the .xxproj file, and manually edits the path of the reference. As another poster stated, you can get the new path from the TargetDir property: http://msdn.microsoft.com/en-us/library/aa372064%28VS.85%29.aspx
Example of creating Custom Actions: http://msdn.microsoft.com/en-us/library/9cdb5eda(v=vs.80).aspx

Add your Executable to your Project TO The Main Dir, right click-> Copy To OutPutDirectory -> Copy
this is easiest way to make your file to copy to your target dir, and have your SourceControl Visual studio plugin manage it.

Your executable should be be somewhere in your project source files structure, perhaps in a subfolder. When you add this executable file to project it should then be added on a relative path which is what you want. If this is not happening you should manually edit csprj file. To do this, right click on project, unload it, right click again and edit project file.
Of course, your executable file should have its property Build Action set to None and Copy to output Directory to what you want.
If for some reason you cannot add this executable directly into your project files structure I'd suggest to use pre-build event to copy it from where it exists into your project files.