using System.Runtime.InteropServices;

public enum ShowWindowCommands : int
{

    SW_HIDE = 0,
    SW_SHOWNORMAL = 1,    //用最近的大小和位置顯示，激活
    SW_NORMAL = 1,
    SW_SHOWMINIMIZED = 2,
    SW_SHOWMAXIMIZED = 3,
    SW_MAXIMIZE = 3,
    SW_SHOWNOACTIVATE = 4,
    SW_SHOW = 5,
    SW_MINIMIZE = 6,
    SW_SHOWMINNOACTIVE = 7,
    SW_SHOWNA = 8,
    SW_RESTORE = 9,
    SW_SHOWDEFAULT = 10,
    SW_MAX = 10
}
[DllImport("shell32.dll")]
public static extern IntPtr ShellExecute(
    IntPtr hwnd,
    string lpszOp,
    string lpszFile,
    string lpszParams,
    string lpszDir,
    ShowWindowCommands FsShowCmd
);

ShellExecute(IntPtr.Zero, "open", UrlOrPath, null, null, ShowWindowCommands.SW_SHOWNORMAL);

ShellExecute(NULL, "open", "IEXPLORE", "http://www.csdn.net", NULL, SW_SHOWMAXIMIZED);

using System.Diagnostics;

private static string Execute(string exePath, string parameters)
{
    string result = String.Empty;

    using (Process p = new Process())
    {
        p.StartInfo.UseShellExecute = false;
        p.StartInfo.CreateNoWindow = true;
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.FileName = exePath;
        p.StartInfo.Arguments = parameters;
        p.Start();
        p.WaitForExit();

        result = p.StandardOutput.ReadToEnd();
    }

    return result;
}