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1<\/a>
2<\/a>
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9<\/a><\/pre><\/td>\n  
public<\/span> <\/span>static<\/span> <\/span>string<\/span> <\/span>Decode<\/span>(<\/span>string<\/span> <\/span>s<\/span>)<\/span>
<\/span>{<\/span>
<\/span>MatchCollection<\/span> <\/span>rr<\/span> <\/span>=<\/span> <\/span>Regex<\/span>.<\/span>Matches<\/span>(<\/span>s<\/span>,<\/span>@<\/span>"<\/span>(?:=<\/span>\\?<\/span>)([^<\/span>\\?<\/span>]+)(?:<\/span>\\?<\/span>B<\/span>\\?<\/span>)([^<\/span>\\?<\/span>]*)(?:<\/span>\\?<\/span>=)<\/span>"<\/span><\/span>)<\/span>;<\/span>
<\/span>string<\/span> <\/span>charset<\/span> <\/span>=<\/span> <\/span>rr<\/span>[<\/span>0<\/span>]<\/span>.<\/span>Groups<\/span>[<\/span>1<\/span>]<\/span>.<\/span>Value<\/span>;<\/span>
<\/span>string<\/span> <\/span>data<\/span> <\/span>=<\/span> <\/span>rr<\/span>[<\/span>0<\/span>]<\/span>.<\/span>Groups<\/span>[<\/span>2<\/span>]<\/span>.<\/span>Value<\/span>;<\/span>
<\/span>byte<\/span>[]<\/span> <\/span>b<\/span> <\/span>=<\/span> <\/span>Convert<\/span>.<\/span>FromBase64String<\/span>(<\/span>data<\/span>)<\/span>;<\/span>
<\/span>string<\/span> <\/span>res<\/span> <\/span>=<\/span> <\/span>Encoding<\/span>.<\/span>GetEncoding<\/span>(<\/span>charset<\/span>)<\/span>.<\/span>GetString<\/span>(<\/span>b<\/span>)<\/span>;<\/span>
<\/span>return<\/span> <\/span>res<\/span>;<\/span>
<\/span>}<\/span>
<\/span><\/pre><\/td>\n<\/tr><\/table>\n\n");