C#

dataGridViewUserControl1 dgv1 = new dataGridViewUserControl1();
dgv1.ColumnCount = 25;
dgv1.RowCount = 20;

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace UserControlDemo
{
    public partial class dataGridViewUserControl1 : UserControl
    {
        public dataGridViewUserControl1()
        {
            InitializeComponent();
        }

        private int columnCount;

        public int ColumnCount
        {
            get { return columnCount; }
            set { columnCount = value; }
        }

        private int rowCount;

        public int RowCount
        {
            get { return rowCount; }
            set { rowCount = value; }
        }

        private void UserControl1_Load(object sender, EventArgs e)
        {
            // create datagridviewcolumns
            for (int i = 0; i < columnCount; i++)
            {
                dataGridView1.Columns[i].Name = "column " + i;
            }

            // create datagridviewrows
            for (int i = 0; i < rowCount; i++)
            {
                string[] rowName = new string[] { "row" + i.ToString() };
                dataGridView1.Rows.Add(rowName);
            }
        }
    }
}

[System.Flags]
public enum PrescriptionTypePrint
{
  PrescriptionOnly = 1,
  InstructionOnly = 2,
  //Both = PrescriptionOnly | InstructionOnly
}

if (pp == (PrescriptionTypePrint.PrescriptionOnly | PrescriptionTypePrint.InstructionOnly))
{
  //execute this block
}

PrescriptionOnly  =  01
InstructionOnly   =  10
Both              =  11

01 or 11

None               00     X
PrescriptionOnly   01     Y
InstructionOnly    10     X
Both               11     Y

if ((pp & PrescriptionTypePrint.PrescriptionOnly) != 0)
   {
   ...

if( (pp & PrescriptionTypePrint.Both) != 0)
{
    // execute this block
}

if( ( pp & PrescriptionOnly ) != 0 )
{
    // execute in case of PrescriptionOnly or Both
    //   Since Both sets, among others, the PrescriptionOnly-bit.
}

[Flags]
enum testEnum
{
    p1 = 1,
    p2 = 2,
    p3 = 3,
    p4 = 4,
    p5 = 5
}

private void TestExOr()
{
    testEnum t1 = testEnum.p3;
    
    testEnum t2 = testEnum.p5;
    
    // true
    bool test1 = t1 == (testEnum.p1 ^ testEnum.p2);
    bool test2 = t2 == (testEnum.p1 ^ testEnum.p4);
    bool test3 = t2 == (testEnum.p0 ^ testEnum.p5);
    
    // false
    bool test4 = t1 == (testEnum.p2 ^ testEnum.p3);
    bool test5 = t2 == (testEnum.p2 ^ testEnum.p3);
    bool test6 = t2 == (testEnum.p5 ^ testEnum.p4);
    bool test7 = t2 == (testEnum.p5 ^ testEnum.p1);

    // is the false result here a deal-breaker ?
    bool test8 = t2 == (testEnum.p5 ^ testEnum.p5);}