编写一个程序，要求用户输入邮件地址，Email地址必须符合规范。

c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\obj\x86\Debug\S6_2.EMailCheck.resources c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\obj\x86\Debug\S6_2.Properties.Resources.resources c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\obj\x86\Debug\S6-2.csproj.GenerateResource.Cache c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\bin\Debug\S6-2.exe c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\bin\Debug\S6-2.pdb c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\obj\x86\Debug\S6-2.exe c:\users\cephal\documents\visual studio 2010\Projects\S6-2\S6-2\obj\x86\Debug\S6-2.pdb