how to solve this error in openfileDialog

My code:

OpenFileDialog obj_openfile = new OpenFileDialog();
            obj_openfile.Filter = "Select file|*.txt|*.docs|*.doc";
            obj_openfile.Title = "Selct Your File";
            obj_openfile.FileName = "";
            if (obj_openfile.ShowDialog() == true)
            {
                FileName = obj_openfile.FileName;
            }

My Error::Operator '==' cannot be applied to operands of type 'System.Windows.Forms.DialogResult' and 'bool'

gowthaman8870226416