How to get a comma separated string from an array

We can get a comma-separated string from an array using String.Join() method.

Example: String.Join()

string[] animals = { "Cat", "Alligator", "Fox", "Donkey" };
var str = String.Join(",", animals);

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In the same way, we can get a comma-separated string from the integer array.

Example: String.Join()

int[] nums = { 1, 2, 3, 4 };
var str = String.Join(",", nums);

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We can also get a comma separated string from the object array, as shown below.

Example: String.Join()

Person[] people = {
        new Person(){ FirstName="Steve", LastName="Jobs"},
        new Person(){ FirstName="Bill", LastName="Gates"},
        new Person(){ FirstName="Lary", LastName="Page"}
    };
 
var str = String.Join(",", people.Select(p =&gt; p.FirstName) );

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Thus, we can easily get the string with comma separated or any other separator from the array in C#.