using System;
using System.Linq;
using System.Globalization;
 
public class Test
{
	public static void Main()
	{
 
        var today = DateTime.Today;
        var beforeMonths = Enumerable.Range(1, 12)
                .Where(i => i < today.Month)
                .Select(i => new DateTime(today.Year, i, 1))
                .ToList();
 
        foreach(var dt in beforeMonths)
            Console.WriteLine(dt.ToString());
	}
}
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