Convert Decimal to Char c#

The Regex.Matches method can be used to extract the decimal values of the characters and then Select method of IEnumerable can be used to convert each decimal value into character and then a string can be constructed from the array of chars as shown below:

string str =  "& #1047;& #1076;& #1088;& #1072;& #1074;& #1077;& #1081;, & #1089;& #1074;& #1103;& #1090;";

MatchCollection charNums = Regex.Matches(str,@"(?<=#\s*)\d+(?=\s*)", 
                                    RegexOptions.CultureInvariant);
string strFinal = new string(charNums.OfType<Match>().Select (
                            m => (char)Convert.ToInt32(m.Value)).ToArray());
Console.WriteLine (strFinal);

Output

Здравейсвят