Method 1:
Windows.System.Launcher.LaunchUriAsync(new Uri("abc@outlook.com?subject=hello world&body=world"));
Reference: http://dotnet.dzone.com/articles/how-send-mail-your-windows
Method2:
EmailRecipient sendTo = new EmailRecipient()
{
Address = "abc@outlook.com"
};
EmailMessage mail = new EmailMessage();
mail.Subject = "google";
mail.Body = "\n\n\nmail body";
mail.To.Add(sendTo);
mail.CC.Add(sendTo);
await EmailManager.ShowComposeNewEmailAsync(mail);