There are times when you would use the read-only wrapper in order to prevent modifying the ArrayList. We use the ArrayList.ReadOnly method to create such collection. When doing so , you might want to check if the ArrayList is Read-only or not. How to Check if the ArrayList is read-only in C# ? Use the IsReadOnly property defined in the ArrayList object to check this.

Here’s the code that demonstrates how one can get the total number of elements contained in the ArrayList using C# using the Count property of the ArrayList. How to Get the number of elements in ArrayList in C# ?