Separator Delimited ToString for Array, List, Dictionary, Generic IEnumerable

Often programmers want to convert an array into one string with for example comma delimited.
Traditionally, in C#, it can be achieved by

int[] array = {1,2,3};
string delimited = string.Join(”,”, array);
Console.WriteLine(delimited ) // output: "1,2,3"
 

However, string.Join does not apply to any generic IEnumerable object. It would so much easier if this method behavior could be applied [...]

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