There are some circumstances where you want to compare two arrays or collections using reference equality, but often you will want a deep comparison instead (that is, one that compares two collections on an element-by-element basis).

If you intended to make a deep comparison then the solution depends on whether or not you are using C# 3.5 or later. From C# 3.5 onward LINQ is available and you can replace the call to Equals with a call to the LINQ extension method SequenceEqual. If this is not possible then you can implement a helper function to compare arrays, which can then be used throughout your code.

This example outputs "False" because calling Equals on an array only does a reference comparison.

The following example outputs "True" twice and uses two different methods of performing a deep comparison of the array.

MSDN: Enumerable.SequenceEqual Method.