Dynamic_Games.NonCoopForm.AddPlayerButton_Click C# (CSharp) Method

        private async void AddPlayerButton_Click(object sender, EventArgs e)
        {
            graphBox.Image = null;

            await PutTaskDelayShort();

            Random rand = new Random();
            int edgeNrTmp = edgeNr;
            edgeNrTmp += rand.Next(N - 1) + 1;

            Tuple<int[,], int[,]> t = ncManager.AddPlayerGenGraph(N, edgeNr, edgeNrTmp, graph, checkMatrix);
            int[,] tmpGraph = t.Item1;
            int[,] tmpCheckMatrix = t.Item2;

            N++;
            NoPTB.Text = N + "";
            edgeNr = edgeNrTmp;

            checkMatrix = new int[N, N];
            checkMatrix = tmpCheckMatrix;
            graph = new int[edgeNr, 2];
            graph = tmpGraph;

            int[] tmpColors = new int[N];

            for (int i = 0; i < N - 1; i++)
            {
                tmpColors[i] = colors[i];
            }

            if (rand.Next(2) == 0)
            {
                tmpColors[N - 1] = 3; // Defector
                nrDefTB.Text = (int.Parse(nrDefTB.Text) + 1) + "";
            }
            else
            {
                tmpColors[N - 1] = 4; // Cooperator
                nc++;
                NrCoopTB.Text = nc + "";
            }

            percTB.Text = (nc * 100 / N) + "";
            colors = tmpColors;

            selflesness = ncManager.AddPlayerGenSelflesness(N, selflesness);

            DrawGraph();
        }