Function for Database Backup of MS SQL Server using C#

public void GetBackup()
{
    try
    {
        String MontName = "";
        int Month = DateTime.Today.Month;
        switch (Month)
        {
            case 1:
                MontName = "JAN";
                break;
            case 2:
                MontName = "FEB";
                break;
            case 3:
                MontName = "MAR";
                break;
            case 4:
                MontName = "APR";
                break;
            case 5:
                MontName = "MAY";
                break;
            case 6:
                MontName = "JUN";
                break;
            case 7:
                MontName = "JUL";
                break;
            case 8:
                MontName = "AUG";
                break;
            case 9:
                MontName = "SEP";
                break;
            case 10:
                MontName = "OCT";
                break;
            case 11:
                MontName = "NOV";
                break;
            case 12:
                MontName = "DEC";
                break;
        }
        string MonthYear = MontName + "_" + DateTime.Today.Year;
        string targetPath = @ "E:\DatabaseBackup";
        if (!System.IO.Directory.Exists(targetPath))
        {
            System.IO.Directory.CreateDirectory(targetPath);
        }
        targetPath = @ "E:\DatabaseBackup\Data_Backup_" + MonthYear;
        if (!System.IO.Directory.Exists(targetPath))
        {
            System.IO.Directory.CreateDirectory(targetPath);
        }
        string Date = DateTime.Today.Day + "_" + DateTime.Today.Month + "_" + DateTime.Today.Year;
        SqlConnection cn = new SqlConnection("Your connection string here");
        string STRSQL = @ "BACKUP DATABASE TEST TO DISK='" + targetPath + "\\TEST_" + Date + ".bak'";
        cn.Open();
        SqlCommand cmd = new SqlCommand(STRSQL, cn);
        cmd.ExecuteNonQuery();
        cn.Close();
    }
    catch (SqlException ex)
    {
        MessageBox.Show("DataBase Backup : " + ex.Message);
    }
}