Data Grid View (dgv) in c# windows forms

using static System.Windows.Forms.VisualStyles.VisualStyleElement.Rebar;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //no changing rows and columns
            dgvTable.AllowUserToAddRows = false;
            dgvTable.AllowUserToDeleteRows = false;
            dgvTable.AllowUserToResizeRows = false;
            dgvTable.AllowUserToResizeColumns = false;

            //hide heareds
            dgvTable.RowHeadersVisible = false;
            dgvTable.ColumnHeadersVisible = false;

            //align text(value) to middleCenter - middle and centred
            dgvTable.RowsDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; // in all cells - ad default

            //use current form font but bolded and put it for dvgTable
            dgvTable.Font = new Font(this.Font, FontStyle.Bold);

            //remove scroll bars - can be none/vertical/horizontal/both
            dgvTable.ScrollBars = ScrollBars.None;


            //disable pressing cells
            //dgvTable.Enabled = false;



            //set custom dimensions
            SetDimension(5, 5);

            //paint fields
            PaintFields();

            //add text to fields
            AddText();

        }

        private void SetDimension(int numRows, int numColumns)
        {
            //number of rows and columns
            dgvTable.RowCount = numRows;
            dgvTable.ColumnCount = numColumns;


            int dimension = 75;

            for (int i = 0; i < dgvTable.RowCount; i++)
            {
                dgvTable.Rows[i].Height = dimension;
            }

            for (int i = 0; i < dgvTable.ColumnCount; i++)
            {
                dgvTable.Columns[i].Width = dimension;
            }


            //resize whole dvgTable
            dgvTable.Width = dgvTable.ColumnCount * dimension + 3;
            dgvTable.Height = dgvTable.RowCount * dimension + 3;    // +3 beacause left and up sides are larger

        }

        private void AddText()
        {
            //go through dgvTable
            for (int row = 0; row < dgvTable.Rows.Count; row++)  // Rows.Count/RowCount same
            {
                //var variable; // not good because with var must be initialized
                var currentRow = dgvTable.Rows[row]; // var is DataGridView
                for (int column = 0; column < dgvTable.ColumnCount; column++)
                {
                    //DataGridViewCell currentCell = currentRow.Cells[column];
                    DataGridViewCell currentCell = currentRow.Cells[column];

                    //currentCell.Style.ForeColor = Color.Red; //text color - default is black
                    //currentCell.Style.BackColor = Color.Blue; //background color

                    currentCell.Value = $"{row} - {column}";    //putting value on current field
                    currentCell.ToolTipText = $"FIELD: {row} - {column}";   //changing the pop up(what we see when hovering) for current field

                    // dgvTable.Rows[row].Cells[column].Value = $"{row} - {column}";
                }
            }

        }

        private void PaintFields()
        {
            Random rand = new Random();

            //go through dgvTable
            for (int row = 0; row < dgvTable.Rows.Count; row++)  // Rows.Count/RowCount same
            {
                //var variable; // not good because with var must be initialized
                var currentRow = dgvTable.Rows[row]; // var is DataGridView
                for (int column = 0; column < dgvTable.ColumnCount; column++)
                {
                    //DataGridViewCell currentCell = currentRow.Cells[column];
                    var currentCell = currentRow.Cells[column];

                    currentCell.Style.BackColor = Color.FromArgb(rand.Next(75, 256), rand.Next(75, 256), rand.Next(75, 256));//paint current field with random color
                    // start value is 75 - field is not lighter, so we could see black colored text
                }
            }

        }

        // what will happen on mouse click on cell
        private void dgvTable_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            MessageBox.Show($"Pressed cell: {e.RowIndex} - {e.ColumnIndex}");

            DataGridViewCell cell = dgvTable.Rows[e.RowIndex].Cells[e.ColumnIndex];
            //var


            //colors of current cell
            cell.Style.BackColor = Color.Black;
            cell.Style.ForeColor = Color.White;


            //cahnge color of selected cell
            cell.Style.SelectionBackColor = Color.Orange;
        }


    }
}