Namespace constant in C#

I believe it's not possible. But you can create a Class with only constants.

public static class GlobalVar
{
    public const string MY_CONST = "Test";
}

and then use it like

class Program
{
    static void Main()
    {
        Console.WriteLine(GlobalVar.MY_CONST);
    }
}

This is not possible

From MSDN:

The const keyword is used to modify a declaration of a field or local variable.

Since you can only have a field or local variable within a class, this means you cannot have a global const. (i.e namespace const)

You can use the constants in your other classes if you add the "Using Static" too:

using static MyNameSpace.MyGlobals;

namespace MyNameSpace {
    public static class MyGlobals{
        public const bool SAVE_LOGSPACE = true;
        public static readonly DateTime BACKTEST_START_DATE = new DateTime(2019,03,01);
}