Please how to display in this code the body text and save this text as a text file.

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C#

.NET

Hii everyone ,

i success in this code to display contact details such as email address.the question is,
How i can display the the body text and save this as text file.
also but later i need to search line by line and display text after such as best regards i mean signature of sender .
the code is here.

RequestSettings logininfo = new RequestSettings("",textBox1 .Text ,textBox2 .Text);
logininfo.AutoPaging = true;
ContactsRequest crequest=new ContactsRequest(logininfo) ;
Feed<contact> feedcontacts = crequest.GetContacts();
foreach (Contact gmailAddresses in feedcontacts.Entries)
{
   Console.WriteLine("\t" + gmailAddresses.Title);
   listBox1.Items.Add(gmailAddresses.Title);
   foreach (EMail emailId in gmailAddresses.Emails) 
   {
      Console.WriteLine("\t" + emailId.Address);
      listBox1.Items.Add(" " + emailId.Address);
   }
}