C# Declare multiple dynamically named variables [duplicate]

Answer 1

Don't try to use dynamically named variables. That's simply not how variables work in C#.

Use an array of lists:

List<string>[] user = new List<string>[infoForUserSessions.Count];

for (int i = 0; i < infoForUserSessions.Count; i++) {
  user[i] = new List<string>();
}

If the number of sessions can change, you would use a List<List<string>> instead, so that you can add lists to it when you add items to the infoForUserSessions list.

Answer 2

You can use Dictionary<String, List<string>>

Dictionary associate a key to a value, like an physical Dictionary book.

Dictionary<String, List<string>> myDict = new Dictionary<String, List<string>>();

for (int i = 0; i < infoForUserSessions.Count; ++i){
    myDict.add("user" + i, new List<string>());
}

Here is an exemple how to use Dictionary :

Dictionary<String, String> myDict = new Dictionary<String, String>();
//Line below will add both KEY and a VALUE to the dictionary, BOTH are linked one to eachother
myDict.add("apple", "Apple is a brand");

//This above line return "Apple is a brand"
myDict["apple"];