SO: Dynamic String format mask from DB

CSharp · Console

/Program.cs

using System;
					
public class Program
{
	public static void Main()
	{
		string mask = GetMaskFromDB();

        string username = "abc";
        DateTime dt = DateTime.Now;

        var result = string.Format(mask, username, dt);
		Console.WriteLine(result);
	}
	
	private static string GetMaskFromDB()
	{
		return "{0}/{1:yy}";
	}
}