find the extension of a json file in csharp

You can find the extension of a JSON file using C# by using the Path class provided by the System.IO namespace. Here's an example code snippet that shows how to find the extension of a JSON file:

main.cs
using System.IO;

string filePath = "path/to/file.json";
string extension = Path.GetExtension(filePath);
if (extension == ".json")
{
    Console.WriteLine("JSON file detected.");
}
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The Path.GetExtension method returns the extension of the file as a string. In this example, we are checking if the extension is ".json" to confirm that it is a JSON file. If the extension is ".json", we print out a message to the console.

Note that in order to use the Path class, you need to add a reference to the System.IO namespace at the top of your C# file.