Got it working.

55_Life/csharp/Program.cs

@@ -1,6 +1,6 @@
 // See https://aka.ms/new-console-template for more information
 
-using System.Xml;
+using System.Text;
 
 IEnumerable<string> ReadPattern(int limitHeight)
 {
@@ -47,6 +47,10 @@ void PrintHeader()
         .First();
 }
 
+try
+{
+
+
 
 PrintHeader();
 
@@ -54,11 +58,9 @@ Console.WriteLine("ENTER YOUR PATTERN:");
 // var pattern = ReadPattern(limitHeight: MaxHeight).ToArray();
 var pattern = new[]
 {
-    "     ",
-    "  *  ", 
-    "  *  ", 
-    "  *  ", 
-    "     "
+    "*", 
+    "*", 
+    "*" 
 }; // FOR DEBUGGING PURPOSES
 var (index, value) = GetLongestInput(pattern);
 Console.WriteLine("" + index + ", " + value);
@@ -69,26 +71,42 @@ Console.WriteLine("" + index + ", " + value);
 const int MaxWidth = 70; // Y2
 const int MaxHeight = 24; // X2
 
-var matrix = new int[24, 70]; // TODO understand it
-int population = 0; 
+// var matrix = new int[24, 70]; // TODO understand it
+var matrixSpace = new MatrixSpace(height: 24, width: 70);
+// int population = 0; 
 var isInvalid = false; // TODO understand
 
 
-int x1 = (11 - index / 2) - 1;              // middle x
-int y1 = (33 - value.Length / 2) - 1;       // middle y
-for (var x = 0; x < pattern.Length; x++)
-{
-    for (var y = 0; y < pattern[x].Length; y++)
+
+int minX = (11 - index / 2) - 1;              // middle x
+int minY = (33 - value.Length / 2) - 1;       // middle y
+int maxX = MaxHeight;
+int maxY = MaxWidth;
+var simulation = InitializeSimulation(pattern, matrixSpace);
+
+
+
+Simulation InitializeSimulation(string[] inputPattern, MatrixSpace matrixToInitialize) {
+    var newSimulation = new Simulation();
+
+    for (var x = 0; x < inputPattern.Length; x++)
     {
-        if (pattern[x][y] != ' ')
+        for (var y = 0; y < inputPattern[x].Length; y++)
         {
-            matrix[x1 + x, y1 + y] = 1; // copy the pattern to the middle of the simulation
-            population++; // increments the population
+            if (inputPattern[x][y] != ' ')
+            {
+                matrixToInitialize.Matrix[minX + x, minY + y] = 1; // copy the pattern to the middle of the simulation
+                // population++; // increments the population
+                newSimulation.IncreasePopulation();
+            }
         }
     }
+
+    return newSimulation;
 }
 
-PrintMatrix(matrix);
+
+// PrintMatrix(matrixSpace.Matrix);
 void PrintMatrix(int[,] matrix)
 {
     Console.WriteLine("Matrix:");
@@ -96,149 +114,191 @@ void PrintMatrix(int[,] matrix)
     {
         for (int y = 0; y < matrix.GetLength(1); y++)
         {
-            Console.Write(matrix[x, y].ToString());            
+            var character = matrix[x, y] == 0 ? ' ' : '*';
+            Console.Write(character);
         }
         Console.WriteLine();
     }
 }
 
-
-
-int generation = 0;
-
-void ProcessGeneration()
-{
-    generation++;
-    void PrintPopulation(int generation, int population)
+    void ProcessGeneration()
     {
-        Console.WriteLine($"GENERATION: {generation}\tPOPULATION: {population}");
-        if (isInvalid)
-            Console.WriteLine("INVALID!");
-    }
-    PrintPopulation(generation, population);
-
-    int nextMaxX = MaxHeight, nextMaxY = MaxWidth;
-    int nextMinX = 1, nextMinY = 1;
-    
-    for (int x = 0; x < x1; x++)
-    {
-        Console.WriteLine();
-    }
-
-    for (var x = x1; x < MaxHeight; x++)
-    {
-        Console.WriteLine();
-        for (var y = y1; y < MaxWidth; y++)
+        var matrix = matrixSpace.Matrix; // TODO refactor
+        
+        // generation++;
+        
+        void PrintPopulation(int generation, int population)
         {
-            if (matrix[x, y] == 2)
-            {
-                matrix[x, y] = 0; 
-                continue;
-            }
-
-            if (matrix[x, y] == 3)
-            {
-                matrix[x, y] = 1; // birth?
-                Console.WriteLine(new string(' ', y+1) + "*");
-                continue;
-            }
-
-            nextMinX = Math.Min(x, nextMinX);
-            nextMaxX = Math.Max(x, nextMaxX);
-            nextMinY = Math.Min(y, nextMinY);
-            nextMaxY = Math.Max(y, nextMaxY);
+            Console.WriteLine($"GENERATION: {generation}\tPOPULATION: {population}");
+            if (isInvalid)
+                Console.WriteLine("INVALID!");
         }
-    }
+        PrintPopulation(simulation.Generation, simulation.Population);
 
-    var x2 = MaxHeight;
-    for (int x = x2 + 1; x < MaxHeight; x++) // TODO test +1
-    {
-        Console.WriteLine();
-    }
+        simulation.StartNewGeneration();
 
-    x1 = nextMaxX;
-    x2 = nextMinX;
-    y1 = nextMaxY;
-    var y2 = nextMinY;
-    
-    // TODO boundaries? review
-    if (x1 < 3)
-    {
-        x1 = 3;
-        isInvalid = true;
-    }
+        // LINE 215
+        // x3 = 24 = MaxHeight
+        // y3 = 70 = MaxWidth
+        // x4 = 1
+        // y4 = 1
+        // g = g + 1
 
-    if (x2 > 22)
-    {
-        x2 = 22;
-        isInvalid = true;
-    }
-
-    if (y1 < 3)
-    {
-        y1 = 3;
-        isInvalid = true;
-    }
-
-    if (y2 > 68)
-    {
-        y2 = 68;
-        isInvalid = true;
-    }
-
-    ProcessPopulation();
-    // TODO line 635
-
-    void ProcessPopulation()
-    {
-        var population = 0;
-        for (int x = x1 - 1; x < x2 + 1; x++) // TODO review indices
+        int nextMinX = MaxHeight - 1; // x4
+        int nextMinY = MaxWidth - 1; // y4
+        int nextMaxX = 0; // x3
+        int nextMaxY = 0; // y3
+        
+        
+        // prints lines before
+        for (int x = 0; x < minX; x++)
         {
-            for (int y = y1 - 1; y < y2 + 1; y++) // TODO review indices
+            Console.WriteLine();
+        }
+        
+        // prints matrix and 
+        for (var x = minX; x < maxX; x++)
+        {
+            var printedLine = Enumerable.Repeat(' ', MaxWidth).ToList();
+            for (var y = minY; y < maxY; y++)
             {
-                var counter = 0;
-                for (int i = x - 1; i < x + 1; i++)
+                if (matrix[x, y] == 2)
                 {
-                    for (int j = y - 1; j < y + 1; j++)
-                    {
-                        if (matrix[i, j] == 1 || matrix[i, j] == 2)
-                            counter++;
-                    }
+                    matrix[x, y] = 0; 
+                    continue;
+                }
+                if (matrix[x, y] == 3)
+                {
+                    matrix[x, y] = 1;
+                }
+                else if (matrix[x, y] != 1)
+                {
+                    continue;
                 }
 
-                if (matrix[x, y] == 0)
+                printedLine[y] = '*';
+
+                nextMinX = Math.Min(x, nextMinX);
+                nextMaxX = Math.Max(x+1, nextMaxX);
+                nextMinY = Math.Min(y, nextMinY);
+                nextMaxY = Math.Max(y+1, nextMaxY);
+            }
+            Console.WriteLine(string.Join(separator: null, values: printedLine));
+        }
+
+        // prints lines after
+        for (int x = maxX + 1; x < MaxHeight; x++) // TODO test +1
+        {
+            Console.WriteLine();
+        }
+        Console.WriteLine();
+
+        minX = nextMinX;
+        maxX = nextMaxX;
+        minY = nextMinY;
+        maxY = nextMaxY;
+        
+        // TODO boundaries? review
+        if (minX < 3)
+        {
+            minX = 3;
+            isInvalid = true;
+        }
+        if (maxX > 22)
+        {
+            maxX = 22;
+            isInvalid = true;
+        }
+        if (minY < 3)
+        {
+            minY = 3;
+            isInvalid = true;
+        }
+        if (maxY > 68)
+        {
+            maxY = 68;
+            isInvalid = true;
+        }
+
+        // LINE 309
+        ProcessPopulation();
+
+        void ProcessPopulation()
+        {
+            // var population = 0;
+            for (int x = minX - 1; x < maxX + 2; x++) // TODO review indices
+            {
+                for (int y = minY - 1; y < maxY + 2; y++) // TODO review indices
                 {
-                    if (counter == 3)
+                    var neighbors = 0;
+                    for (int i = x - 1; i < x + 2; i++) // TODO review indices
+                    {
+                        for (int j = y - 1; j < y + 2; j++) // TODO review indices
+                        {
+                            if (matrix[i, j] == 1 || matrix[i, j] == 2)
+                                neighbors++;
+                        }
+                    }
+                    // PrintMatrix(matrix);
+                    if (matrix[x, y] == 0)
+                    {
+                        if (neighbors == 3)
+                        {
+                            matrix[x, y] = 3;
+                            // population++;
+                            simulation.IncreasePopulation();
+                        }
+                    }
+                    else if (neighbors is < 3 or > 4)
                     {
                         matrix[x, y] = 2;
-                        population++;
+                    }
+                    else
+                    {
+                        // population++;
+                        simulation.IncreasePopulation();
                     }
                 }
-                else if (counter is < 3 or > 4)
-                {
-                    matrix[x, y] = 2;
-                }
-                else
-                {
-                    population++;
-                }
             }
+
+            // LINE 635
+            minX--;
+            minY--;
+            maxX++;
+            maxY++;
         }
+        // PrintMatrix(matrix);
+        ProcessGeneration();
     }
-    PrintMatrix(matrix);
+
+
+
+    Console.WriteLine();
+    Console.WriteLine();
+    Console.WriteLine();
     ProcessGeneration();
 }
+catch (Exception e)
+{
+    Console.WriteLine(e);
+}
+public class Simulation
+{
+    public int Generation { get; private set; }
 
+    public int Population { get; private set; }
 
+    public void StartNewGeneration()
+    {
+        Generation++;
+        Population = 0;
+    }
 
-Console.WriteLine();
-Console.WriteLine();
-Console.WriteLine();
-ProcessGeneration();
-
-
-
-
+    public void IncreasePopulation()
+    {
+        Population++;
+    }
+}
 
 
 // int x1 = 1, y1 = 1;
@@ -250,3 +310,28 @@ ProcessGeneration();
 
 
 
+public class MatrixSpace
+{
+    public int[,] Matrix { get; }
+
+    public MatrixSpace(int height, int width)
+    {
+        Matrix = new int[height, width];
+    }
+
+    public override string ToString()
+    {
+        var stringBuilder = new StringBuilder();
+        for (var x = 0; x < Matrix.GetLength(0); x++)
+        {
+            for (var y = 0; y < Matrix.GetLength(1); y++)
+            {
+                var character = Matrix[x, y] == 0 ? " ": Matrix[x, y].ToString();
+                stringBuilder.Append(character);
+            }
+
+            stringBuilder.AppendLine();
+        }
+        return stringBuilder.ToString();
+    }
+}