Using System.Text.StringBuilder

Many times using the StringBuilder class is faster than concatenation. If you have extensive string manipulations to perform, consider using the StringBuilder class.

First add System.Text to your uses:

Uses

  System.Text;

Then use the methods from the StringBuilder class. For example, you can use Append and ToString as follows:

method MainForm.StringBuilderBtn_Click(sender: System.Object; e: System.EventArgs);
var
  FirstName : String;
  LastName : String;
  sbFullName := new StringBuilder;
begin
  FirstName := 'Mike';
  LastName := 'Prestwood';

  //Concatenation.
  MessageBox.Show(FirstName + " " + LastName);

  //StringBuilder class.
  sbFullName.Append(FirstName);
  sbFullName.Append(" ");
  sbFullName.Append(LastName);

  MessageBox.Show(sbFullName.ToString);
end;