Very Easy C# Solution
\n    public class Solution\n    {\n        public string EntityParser(string text)\n        {\n            IDictionary<string, char> spec2Char = new Dictionary
```\n    public class Solution\n    {\n        public string EntityParser(string text)\n        {\n            IDictionary<string, char> spec2Char = new Dictionary<string, char>()\n            {\n                { "&quot;", \'\\"\'},\n                {"&apos;", \'\\\'\' },\n                {"&amp;", \'&\' },\n                {"&gt;", \'>\' },\n                {"&lt;", \'<\' },\n                {"&frasl;", \'/\' }\n            };\n\n            foreach (var p in spec2Char)\n            {\n                text = text.Replace(p.Key, p.Value.ToString());\n            }\n\n            return text;\n        }\n    }\n```
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