public virtual TEnum ConvertFromString(string s)
{
var pair = Pairs.FirstOrDefault(kvp => kvp.Value.Equals(s, StringComparison.OrdinalIgnoreCase));
// ReSharper disable once SuspiciousTypeConversion.Global
if (EqualityComparer <KeyValuePair <TEnum, string> > .Default.Equals(pair))
{
throw new ArgumentException($"Unknown {EntityString}: {s}");
}
return(pair.Key);
}