Simple roguelike map drawing in c# console

gistfile1.txt

using System;
using System.Collections.Generic;

namespace rlike
{
	class Program
	{
		static Random Rng;

		static void Main(string[] args)
		{
			// Settings
			const int MINROOMS = 3;
			const int MAXROOMS = 7;
			const int MINROOMSIZE = 3;
			const int MAXROOMSIZE = 10;

			// Init
			Console.CursorVisible = false;
			Console.SetWindowSize(50, 50);
			Console.SetBufferSize(50, 50);

			Rng = new Random();

			FillScreen('█');

			// Random rooms
			var rooms = new List<Rect>();
			var nrrooms = Rng.Next(MINROOMS, MAXROOMS);
			for (int i = 0; i < nrrooms; i++)
			{
				int width = Rng.Next(MINROOMSIZE, MAXROOMSIZE);
				int height = Rng.Next(MINROOMSIZE, MAXROOMSIZE);
				int x = Rng.Next(0, Console.WindowWidth - width - 1);
				int y = Rng.Next(0, Console.WindowHeight - height - 1);

				var rect = new Rect(x, y, width, height);
				rooms.Add(rect);
			}

			for (int r = 0; r < rooms.Count; r++)
			{
				FillRect(rooms[r], ' ');

				if (r == 0) continue;

				int previousRoomCenterX = rooms[r - 1].CenterX;
				int previousRoomCenterY = rooms[r - 1].CenterY;
				int currentRoomCenterX = rooms[r].CenterX;
				int currentRoomCenterY = rooms[r].CenterY;

				if (Rng.Next(0, 2) == 0)
				{
					HorizontalTunnel(previousRoomCenterX, currentRoomCenterX, previousRoomCenterY);
					VerticalTunnel(previousRoomCenterY, currentRoomCenterY, currentRoomCenterX);
				}
				else
				{
					VerticalTunnel(previousRoomCenterY, currentRoomCenterY, previousRoomCenterX);
					HorizontalTunnel(previousRoomCenterX, currentRoomCenterX, currentRoomCenterY);
				}
			}

			Console.ReadKey();
		}

		static void FillScreen(char c)
		{
			for (int top = 0; top < Console.WindowHeight; top++)
			{
				string line = string.Empty;
				for (int left = 0; left < Console.WindowWidth; left++)
				{
					line += c;
				}

				Console.SetCursorPosition(0, top);
				Console.Write(line);
			}
		}

		static void FillRect(Rect r, char c)
		{
			Console.SetCursorPosition(r.Left, r.Top);

			for (int top = r.Top; top < r.Top + r.Height; top++)
			{
				for (int left = r.Left; left < r.Left + r.Width; left++)
				{
					Console.SetCursorPosition(left, top);
					Console.Write(c);
				}
			}
		}

		static void HorizontalTunnel(int xStart, int xEnd, int y)
		{
			for (int x = Math.Min(xStart, xEnd); x <= Math.Max(xStart, xEnd); x++)
			{
				Console.SetCursorPosition(x, y);
				Console.Write(' ');
			}
		}

		static void VerticalTunnel(int yStart, int yEnd, int x)
		{
			for (int y = Math.Min(yStart, yEnd); y <= Math.Max(yStart, yEnd); y++)
			{
				Console.SetCursorPosition(x, y);
				Console.Write(' ');
			}
		}
	}

	public class Rect
	{
		public int Left { get; set; }
		public int Top { get; set; }
		public int Width { get; set; }
		public int Height { get; set; }
		public int CenterX { get { return (Left + (Width / 2)); } }
		public int CenterY { get { return (Top + (Height / 2)); } }

		public Rect(int l, int t, int w, int h)
		{
			Left = l;
			Top = t;
			Width = w;
			Height = h;
		}
	}
}

this is so helpful! Now I need to figure out how to check for collision before drawing a room... thanks so much!