求字符串解析？解决方法_ASP.NET

求字符串解析？
字符串如下：
ConnectString={Persist Security Info=True;Provider=SQLOLEDB.1;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888};UserName=XX;UserID=XX;

如何得到以下字符串
Persist Security Info=True;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888

注意：Provider=SQLOLEDB.1;也要去掉哈

------解决方案--------------------------------------------------------
正则表达式不会写
通俗点的，可以用截取实现

C# code

string str = "ConnectString={Persist Security Info=True;Provider=SQLOLEDB.1;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888};UserName=XX;UserID=XX;";            string str1 = str.Substring(str.IndexOf('{'));            string str2 = str1.Substring(0, str1.IndexOf('}')).Replace("Provider=SQLOLEDB.1", "");
------解决方案--------------------------------------------------------
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正则表达式不会写
通俗点的，可以用截取实现

C# code

string str = "ConnectString={Persist Security Info=True;Provider=SQLOLEDB.1;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888};UserName=XX;UserID……

------解决方案--------------------------------------------------------
C# codevoid Main(){    string str=@"ConnectString={Persist Security Info=True;Provider=SQLOLEDB.1;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888};UserName=XX;UserID=XX;";    string result=Regex.Replace(Regex.Match(str,@"(?<={)[^}]+(?=})").Value,@"(?i)Provider[^;]+;","");    Console.WriteLine(result);    //Persist Security Info=True;User ID=sa;Password=123456;Data Source=XXXXX;Initial Catalog=DB8888}