Read files from project Folder (Directory) in ASP.Net Core

How to read file from project folder in asp.net core.

I am importing country data using JSON file but that JSON file, I am reading from the computer c drive temp folder. But now I want that to read the JSON file from the project folder.

private void SeedData(EntityTypeBuilder<Country> builder)
{
    using (StreamReader r = new StreamReader(@"C:\temp\CountryImport.json"))
    {
        string json = r.ReadToEnd();
        List<Country> countries = JsonConvert.DeserializeObject<List<Country>>(json);
        builder.HasData(countries);
    }
 }