Creating Custom Encoding

[C# Programming]

As you have seen system encodings, ASCII or UTF. I want to create my own, like some value for some specific character. So to do that I simple make a Character class and a collection to hold 'em. But when I need to convert a value to char it iterates the collection until that value is found and thats too slow. But I have another idea which I have tried and also reached nearby the same performance as Encoding.GetString.


So any suggestions guys ?
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