smtp发送邮件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void button1_Click（object sender EventArgs e）
        {
            try
            {
                P2BEmail email = new P2BEmail（）;
                email.fromEmail = txtfromEmail.Text;
                email.fromPwd = txtfrompwd.Text;
                email.emailType = txtemailtype.Text;
                email.SendEmail（txttoemail.Text txtsubject.Text txtbody.Text ““）;
     

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     12800  2017-12-26 11:42  WindowsFormsApplication1\.vs\WindowsFormsApplication1\v14\.suo

     文件        187  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\App.config

     文件      13312  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.exe

     文件        187  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.exe.config

     文件      26112  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.pdb

     文件      22696  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe

     文件        187  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.config

     文件        490  2017-03-19 05:00  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest

     文件       1008  2017-12-26 13:48  WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs

     文件       8645  2017-12-26 13:48  WindowsFormsApplication1\WindowsFormsApplication1\Form1.Designer.cs

     文件       5817  2017-12-26 13:48  WindowsFormsApplication1\WindowsFormsApplication1\Form1.resx

     文件        864  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       7220  2017-12-26 11:45  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件          0  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

     文件          0  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

     文件          0  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

     文件       1059  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt

     文件       1012  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.GenerateResource.Cache

     文件       2360  2017-12-26 11:50  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csprojResolveAssemblyReference.cache

     文件      13312  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.exe

     文件        180  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Form1.resources

     文件      26112  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.pdb

     文件        180  2017-12-26 11:50  WindowsFormsApplication1\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Properties.Resources.resources

     文件       3057  2017-12-26 13:49  WindowsFormsApplication1\WindowsFormsApplication1\P2BEmailAsync.cs

     文件        536  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Program.cs

     文件       1356  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Properties\AssemblyInfo.cs

     文件       2861  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Resources.Designer.cs

     文件       5612  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Resources.resx

     文件       1111  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Settings.Designer.cs

     文件        249  2017-12-26 11:42  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Settings.settings

............此处省略16个文件信息