C#Winform判断文件和路径是否存在

 //选择文件夹
            FolderBrowserDialog dia = new FolderBrowserDialog();
            if (dia.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string filePath = dia.SelectedPath;

                Directory.Exists(filePath);//判断文件夹是否存在
            }

            //选择文件
            OpenFileDialog dia = new OpenFileDialog();
            if (dia.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string filePath = dia.SelectedPath;

                File.Exists(filePath);//判断文件是否存在
            }