diff --git a/cs/divide-players-into-teams-of-equal-skill.cs b/cs/divide-players-into-teams-of-equal-skill.cs
new file mode 100644
index 0000000..d0f8736
--- /dev/null
+++ b/cs/divide-players-into-teams-of-equal-skill.cs
@@ -0,0 +1,18 @@
+public class Solution {
+    public long DividePlayers(int[] skill) {
+        Array.Sort(skill);
+
+        var expectedSkill = skill[0] + skill[skill.Length - 1];
+
+        long chemistry = 0;
+        for (int i = 0, j = skill.Length - 1; i < j; ++i, --j) {
+            if (skill[i] + skill[j] != expectedSkill) {
+                return -1;
+            }
+
+            chemistry += skill[i] * (long)skill[j];
+        }
+
+        return chemistry;
+    }
+}