improve readability

Author: justcoding121

src/Advanced.Algorithms/DataStructures/Tree/B+Tree.cs

@@ -24,6 +24,17 @@ public class BpTree<T> : IEnumerable<T> where T : IComparable
         private readonly int maxKeysPerNode;
         private readonly int minKeysPerNode;
 
+        public BpTree(int maxKeysPerNode = 3)
+        {
+            if (maxKeysPerNode < 3)
+            {
+                throw new Exception("Max keys per node should be atleast 3.");
+            }
+
+            this.maxKeysPerNode = maxKeysPerNode;
+            this.minKeysPerNode = maxKeysPerNode / 2;
+        }
+
         /// <summary>
         /// Time complexity: O(1).
         /// </summary>
@@ -52,17 +63,6 @@ public T Min
             }
         }
 
-        public BpTree(int maxKeysPerNode = 3)
-        {
-            if (maxKeysPerNode < 3)
-            {
-                throw new Exception("Max keys per node should be atleast 3.");
-            }
-
-            this.maxKeysPerNode = maxKeysPerNode;
-            this.minKeysPerNode = maxKeysPerNode / 2;
-        }
-
         /// <summary>
         /// Time complexity: O(log(n)).
         /// </summary>