using System;
 
public class Test
{
	public static void Main()
	{
		var grid = CreateGrid(8, 'o', 'x');
		PrintGrid(grid);
	}
 
	private static void PrintGrid(char[,] grid)
	{
		for (var row = 0; row < grid.GetLength(0); row++)
		{
			for (var col = 0; col < grid.GetLength(0); col++)
			{
				Console.Write(grid[row, col]);
			}
			Console.WriteLine();
		}
	}
 
	private static char[,] CreateGrid(int gridSize, char light, char dark)
	{
		var grid = new char[gridSize, gridSize];
 
 
		bool toggle = false;
		for (var row = 0; row < gridSize; row++)
		{
			for (var col = 0; col < gridSize; col++)
			{
				grid[row, col] = toggle ? dark : light;
				toggle = !toggle;
			}
		}
 
		return grid;
	}
}

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