C#

static class program
{
  internal MyCustomHashtable mch = new MyCustomHashtable();
}

or...

public Form1 : form
{
  internal MyCustomHashtable mch = new MyCustomHashtable();


//an example of accessing within button click
//would work with either program or form initialization
  button1_click(...)
{
//just an idea of usage...
 string val = mch.GetValue(textBox1.text);
 //...do something with val...
}
}

static program
{
   internal MyCustomHashtable mch;
   

   static void main()
   {
     try
     {
        //initialize in a catchable area to avoid unhandled exceptions
        mch = new MyCustomHashtable();
     }
     catch (Exception ex)
     {
       //log or alert of failure to initialize hashtable or other program global variables
     }
   }

}

public partial class Form1 : Form
    {

        //hashtable for empData
        Hashtable empData = new Hashtable();

        public Form1()
        {
            InitializeComponent();

            //variables for pulling data from data array

            string fName = "";
            string mName = "";
            string lName = "";
            string userProfile = "";
            string userEIN = "";

            using (CsvReader csv = new CsvReader(new StreamReader(@"C:\temp\test.csv"), true))
            {

                int fieldCount = csv.FieldCount;
                string[] headers = csv.GetFieldHeaders();
                //put data into an array....
                string[] data = new string[csv.FieldCount];


                while (csv.ReadNextRecord())
                {

                    //data put into array
                    csv.CopyCurrentRecordTo(data);


                    //rtv data from array

                    fName = data[1];
                    mName = data[2];
                    lName = data[3];
                    userProfile = data[5];
                    userEIN = data[11];


                    string concatData = (fName + "," + mName + "," + lName + "," + userProfile.ToLower());


                    //put data into hash table

                    empData.Add(userEIN, concatData);

                }//end while

            }


        }// end Form1



        private void button1_Click(object sender, EventArgs e)
        {
            //user entered ok - 

            string saveEIN = userEIN.Text;

            //retrieve demographic values from has table by ein number provided
           //Display demo data from hashtable to have user confirm identity

            string hashData = empData[saveEIN].ToString();




            //store profile used to login for copy process later
            //not working
            string userName = WindowsIdentity.GetAnonymous().Name;

          
        }


    }

// Just guessing on the field header texts
const string FirstName = "First Name";
const string MiddleName = "Middle Name";
// etc.
fName = csv[FirstName];
mName = csv[MiddleName];
// etc.

const int FirstName = 1;
const int MiddleName = 2;
// etc.
fName = csv[FirstName];
mName = csv[MiddleName];
// etc.