Visual Studio attempts to build and run the code in your project. Using the Start button or F5 runs the program under the debugger. To start building the program, press the green Start button on the Visual Studio toolbar, or press F5 or Ctrl+ F5. If the code you want to run is in a GitHub or Azure DevOps repo, you can use Visual Studio to open the project directly from the repo. See Develop code without projects or solutions. Open the folder by choosing Open > Folder in Visual Studio. If the code is from another development environment, there's no project file. See Start from a Visual Studio solution or project. In Windows File Explorer, look for files with the. Programs that Visual Studio creates have project and solution files.

If you have a folder with many files, first check for a project or solution file. Browse to and select the code file to import it into the project.Right-click the project node in Solution Explorer and choose Add > Existing Item, or select the project and press Shift+ Alt+ A.Rename the project code file to match your code file name.In the new project, replace all the code in the project code file with the contents of your first code listing or file.Use the C# Console Application if you're not sure. Start Visual Studio, and create a new project of the appropriate type.cs file with the contents of your code listing or file. Start Visual Studio, and open an empty C# Console Application project.You can use the Console Application template to create a project to work with the app in Visual Studio. Any app with a Main method is probably a runnable program. If you start from a code listing, code file, or small number of files, first make sure the code is a runnable program from a trusted source. Console apps run in a terminal window, Windows desktop apps start in a new desktop window, and web apps run in a browser hosted by IIS Express. If the build succeeds, the app runs as appropriate for the type of project. At the bottom of the Visual Studio screen, the build output appears in the Output window, and any build errors appear in the Error List window. Visual Studio tries to build and run your project. To run the program, press Ctrl+ F5, select Debug > Start without debugging from the top menu, or select the green Start button.

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