请大家帮我看看下面这段代码为什么不能实现，需要怎么改？多谢！
Dim A, B As String
Dim F, G As String

Dim i As Integer

Dim C(20) As Char
Dim D(12) As Char

A = "abcdefghijk"
C = A.ToCharArray

For i = 0 To 5
D(i) = C(i)
Next

F = D

G = F & "123"

想得到的结果是F="abcdef123",但最后结果是F="abcdef ,并且跟踪发现字符串E的值为"abcdef 为什么少了一个后引号？请各位大哥指点指点，不胜感激！