根據網上的資料稍微修改了一下，原理很簡單，程式碼如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Text;

namespace WindowsFormsApplication2
{
    static class Program
    {
        /// <summary>
        /// 應用程式的主入口點。
        /// </summary>
        [STAThread]
        static void Main()
        {
            GlobalExceptionCapture(() => 
            {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Form1());
            });            
        }

        static void GlobalExceptionCapture(Action mainContent) 
        {
            try
            {
                //設定應用程式處理異常方式：ThreadException處理
                Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
                //處理UI執行緒異常
                Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
                //處理非UI執行緒異常
                AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

                #region 應用程式Main()內容包裝的委託
                mainContent();
                #endregion
            }
            catch (Exception ex)
            {
                string str = GetExceptionMsg(ex, string.Empty);
                MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            string str = GetExceptionMsg(e.Exception, e.ToString());
            MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
            //Log.Write(str);
        }

        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            string str = GetExceptionMsg(e.ExceptionObject as Exception, e.ToString());
            MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
            //Log.Write(str);
        }

        /// <summary>
        /// 生成自定義異常訊息
        /// </summary>
        /// <param name="ex">異常物件</param>
        /// <param name="backStr">備用異常訊息：當ex為null時有效</param>
        /// <returns>異常字串文字</returns>
        static string GetExceptionMsg(Exception ex, string backStr)
        {
            StringBuilder sbr = new StringBuilder();
            sbr.AppendLine("****************************異常文字****************************");
            sbr.AppendLine("【出現時間】：" + DateTime.Now.ToString());
            if (ex != null)
            {
                sbr.AppendLine("【異常型別】：" + ex.GetType().Name);
                sbr.AppendLine("【異常資訊】：" + ex.Message);
                sbr.AppendLine("【堆疊呼叫】：" + ex.StackTrace);
                sbr.AppendLine("【異常物件】：" + ex.Source);
                sbr.AppendLine("【觸發方法】：" + ex.TargetSite);
            }
            else
            {
                sbr.AppendLine("【未處理異常】：" + backStr);
            }
            sbr.AppendLine("***************************************************************");
            return sbr.ToString();
        }
    }  
}