Create new Windows 10 project to know how to create windows 10 projects refer my previous article:
Now create two button one id for send email and one is for send SMS.
To send E-mail
First we are going to see how to send email .Write the below code:
     - private async void ComposeEmail(Contact Torecipient, string messageBody)  
- {  
-     var to = Torecipient.Emails.FirstOrDefault < Windows.ApplicationModel.Contacts.ContactEmail > ();  
-     var emailRecipient = new Windows.ApplicationModel.Email.EmailRecipient(to.Address);  
-     EmailMessage objEmail = new EmailMessage();  
-     objEmail.Subject = "Suresh";  
-     objEmail.To.Add(emailRecipient);  
-     await EmailManager.ShowComposeNewEmailAsync(objEmail);  
- }  
 
You can attach files also while sending email to attach the files write the below code before compose the email task.
     - var stream = Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(attachment);  
-   
- var attachment = new Windows.ApplicationModel.Email.EmailAttachment(  
-     attachment.Name,  
-     stream);  
- emailMessage.Attachments.Add(attachment);  
 
To send SMS
To send an SMS write the below code:
 
     - private async void ComposeSMS(Contact toContatc, string message)  
- {  
-     var chatMessage = new Windows.ApplicationModel.Chat.ChatMessage();  
-     chatMessage.Body = message;  
-     var phone = toContatc.Phones.FirstOrDefault < Windows.ApplicationModel.Contacts.ContactPhone > ();  
-     chatMessage.Recipients.Add(phone.Number);  
-     await Windows.ApplicationModel.Chat.ChatMessageManager.ShowComposeSmsMessageAsync(chatMessage);  
- }