Initial data commit

Task/Associative-array-Merging/C-sharp/associative-array-merging.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+public class Program
+{
+    public static void Main() {
+        var baseData = new Dictionary<string, object> {
+            ["name"] = "Rocket Skates",
+            ["price"] = 12.75,
+            ["color"] = "yellow"
+        };
+        var updateData = new Dictionary<string, object> {
+            ["price"] = 15.25,
+            ["color"] = "red",
+            ["year"] = 1974
+        };
+        var mergedData = new Dictionary<string, object>();
+        foreach (var entry in baseData.Concat(updateData)) {
+            mergedData[entry.Key] = entry.Value;
+        }
+        foreach (var entry in mergedData) {
+            Console.WriteLine(entry);
+        }
+   }
+}