public static void Main()
{
var context = new NewsEntities();
var context2 = new NewsEntities();
// Step 1
PrintCurrentNewsContent(context);
try
{
// Step 2
ChangeFirstNewsContentValue(context, "First");
ChangeFirstNewsContentValue(context2, "Second");
context.SaveChanges();
Console.WriteLine("\n--First changes successfully saved in the DB.");
context2.SaveChanges();
Console.WriteLine("\n--Second changes successfully saved in the DB.");
Console.WriteLine("Bye!");
}
catch (DbUpdateConcurrencyException cex)
{
Console.WriteLine(cex.Message + "\n");
PrintCurrentNewsContent(context);
ChangeFirstNewsContentValue(context, "Second");
}
}
private static void PrintCurrentNewsContent(NewsEntities context)
{
Console.WriteLine("News...");
Console.WriteLine(string.Join("\n", context.News.Select(n => n.NewsContent)));
}
private static void ChangeFirstNewsContentValue(NewsEntities ctx, string user)
{
Console.Write("\n--" + user + " new value: ");
var newContent = Console.ReadLine();
ctx.News.Find(1).NewsContent = newContent;
}
