protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
IConfigurationRoot configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json")
.AddEnvironmentVariables()
.Build();
string connectionString = DatabaseTools.GetConnectionString(configuration);
optionsBuilder.UseSqlServer(connectionString);
}
}