private void button1_Click(object sender, EventArgs e)
        {
            string teststring = StringManipulator.FindStringBetween2Strings(
                "This is a bunch of instance words.",
                "This is a",
                "instance");;

            if (teststring == " bunch of ")
            {
                MessageBox.Show("Passed");
            }
            else
            {
                MessageBox.Show("Failed");
            }


            teststring = StringManipulator.FindStringBetween2Strings(
                "123456789",
                "234",
                "78");

            if (teststring == "56")
            {
                MessageBox.Show("Passed");
            }
            else
            {
                MessageBox.Show("Failed");
            }

            teststring = StringManipulator.GetFileNameFromFullPath(@"C:\Users\Public\myfile.txt");

            if (teststring == "myfile.txt")
            {
                MessageBox.Show("Passed");
            }
            else
            {
                MessageBox.Show("Failed");
            }
        }