DataGridView WrapMode and AutoSizeRow not working

I am new to C# and am having trouble with getting data to wrap in a DataGridView.

I have placed the code I have below. I am not sure what I am doing wrong or missing.

 private void Form_Load(object sender, EventArgs e)
        {
            this.dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCells; // Resizes height changes to all cells for Text to fit
            this.dataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True;  // Wraps text inside the cells
            this.dataGridView1.Columns[4].Width = 300;   // Set colmunDescritpion to fixed width
            this.dataGridView1.Columns[0].Width = 200;   // Set colmunDescritpion to fixed width

            int count = 0;     // Varialble used to perform count of columns before moving to next row in table.
            string line = "";  // Variable used to store data from file.txt


            using (StreamReader sr = new StreamReader(@"File Location"))  // Reads the data from the file.txt file
            {
                while (!sr.EndOfStream)  // Allows for data in Text file to be separated by comma delimiter
                {
                    line += sr.ReadLine() + ",";
                    count++;

                    if (count >= 5) // Adds data to correct rows in table by counting the columns
                    {
                        string[] parts = line.Split(',').ToArray();
                        dataGridView1.Rows.Add(parts[0], parts[1], parts[2], parts[3], parts[4]);
                        count = 0;
                        line = "";
                    }
                }
            }
        }
    }
}

Thanks in advance for any help with fixing this issue.

Regards,