how to save settings in c# .net core 3.1 console application?

Question

As usual, I added a Settings file to my application:

For now the file contains one datetime property which I assign after the application code ran through:

As usual, I assign the property as follows:

static void Main(string[] args)
{
    Properties.Default.LastUpdate = DateTime.Now;
}

Issue
Normally, I would then save the settings to file as follows but for some reason, VS does not like it:

full code as requested:

static void Main(string[] args)
{
    Properties.Default.LastUpdate = DateTime.Now;
    Properties.Default.Save();
    Properties.Default.Reload();
}

Answer 1

I would suggest to use the new configuration options provided by .net core.

-> Add appsettings.json to your project

appsettings.json

{
"name" : "Gary"
}

Init

IConfiguration config = new ConfigurationBuilder()
      .AddJsonFile("appsettings.json", true, true)
      .Build();

In this discussion you will also find a way how to update the value at runtime:

ASP.NET Core appsettings.json update in code