Use a dictionary better, they are exactly meant to store a value corressponding to a given object.
Dictionary<string, int> dict = new Dictionary<string, int>() {
{"Jack", 1 }, {"Alice", 2 }, {"Steven", 3 }, {"Alex", 4 }, {"Katrin", 5 }};
string name = "Jack";
int value = dict[name]; // returns 1
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solved Create enum class to assign Index [duplicate]