private void validateName_Click(object sender, EventArgs e)

        {

            if (nameObj.InitializeDataFiles() == mdNAMEOBJECTLib.ProgramStatus.NoError)

            {               

                try

                {

                    File = new StreamReader("../../mdName.sdf");

                }

                catch (Exception)

                {

                    resultString.Text = "Can't open sample file";

                }               

                

                while ((FullName = File.ReadLine()) != null)

                {

                    nameObj.ClearProperties();

                    nameObj.FullName = FullName;

                    nameObj.Parse();

                    fullName.Text = FullName;

                    Records++;

                }

            }

        }

我得到的错误信息:。Unhandle例外发生在mdNameObj.exe类型'System.NullReferenceExceiption'
附加信息:未将对象引用设置一个对象的实例
。
如何解决这个错误。谢谢，