说明： 设计一个XML文件
1. 利用XmlTextWriter对象完成文件写操作要求有界面，也可以把例子中的程序补充完整
2. 利用XmlTextReader对象对刚才建立的文件完成读操作，同样可以补充例子
(design an XML file one. Completed using XmlTextWriter object to write papers demands interface they may be examples of two complete the procedure. XmlTextReader object to the use of the establishment of just text Reading completed pieces of operation, the same can add example)
文件列表：
ReadXML
.......\AssemblyInfo.
cs
.......
\bin
.......\...
\Debug
.......
\obj
.......\...
\Debug
.......\ReadXML.
cs
.......\ReadXML.
csproj
.......\ReadXML.csproj.
user
.......\ReadXML.
resx
.......\ReadXML.
sln
WriteXML
........\AssemblyInfo.
cs
........
\bin
........\...
\Debug
........
\obj
........\...
\Debug
........\VideoLibrary.
xml
........\WriteXML.
cs
........\WriteXML.
csproj
........\WriteXML.csproj.
user
........\WriteXML.
resx
........\WriteXML.
sln
