[NUI] Fix build warning CA1062 (#2234)

[platform/core/csapi/tizenfx.git] / src / Tizen.NUI / src / internal / ItemIdContainer.cs

diff --git a/src/Tizen.NUI/src/internal/ItemIdContainer.cs b/src/Tizen.NUI/src/internal/ItemIdContainer.cs
index 9e22586..b7e47bd 100755 (executable)
--- a/src/Tizen.NUI/src/internal/ItemIdContainer.cs
+++ b/src/Tizen.NUI/src/internal/ItemIdContainer.cs
@@ -46,7 +46,7 @@ namespace Tizen.NUI
         public ItemIdContainer(global::System.Collections.ICollection c) : this()
         {
             if (c == null)
-                throw new global::System.ArgumentNullException("c");
+                throw new global::System.ArgumentNullException(nameof(c));
             foreach (uint element in c)
             {
                 this.Add(element);
@@ -142,15 +142,15 @@ namespace Tizen.NUI
         public void CopyTo(int index, uint[] array, int arrayIndex, int count)
         {
             if (array == null)
-                throw new global::System.ArgumentNullException("array");
+                throw new global::System.ArgumentNullException(nameof(array));
             if (index < 0)
-                throw new global::System.ArgumentOutOfRangeException("index", "Value is less than zero");
+                throw new global::System.ArgumentOutOfRangeException(nameof(index), "Value is less than zero");
             if (arrayIndex < 0)
-                throw new global::System.ArgumentOutOfRangeException("arrayIndex", "Value is less than zero");
+                throw new global::System.ArgumentOutOfRangeException(nameof(arrayIndex), "Value is less than zero");
             if (count < 0)
-                throw new global::System.ArgumentOutOfRangeException("count", "Value is less than zero");
+                throw new global::System.ArgumentOutOfRangeException(nameof(count), "Value is less than zero");
             if (array.Rank > 1)
-                throw new global::System.ArgumentException("Multi dimensional array.", "array");
+                throw new global::System.ArgumentException("Multi dimensional array.", nameof(array));
             if (index + count > this.Count || arrayIndex + count > array.Length)
                 throw new global::System.ArgumentException("Number of elements to copy is too large.");
             for (int i = 0; i < count; i++)
@@ -196,7 +196,7 @@ namespace Tizen.NUI
                 collectionRef = collection;
                 currentIndex = -1;
                 currentObject = null;
-                currentSize = collectionRef.Count;
+                currentSize = collectionRef?.Count ?? 0;
             }
 
             // Type-safe iterator Current