Count occurrences of a substring: Difference between revisions

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@@ Line 488: / Line 488: @@
 }</lang>
-Using C# 6.0's expression-bodied member and null-conditional operator features:
+Using C# 6.0's expression-bodied member, null-conditional operator, and coalesce operator features:
 <lang c sharp>using System;
@@ Line 494: / Line 494: @@
 {
    public static int CountSubStrings(this string testString, string testSubstring) =>
-       testString?.Split(new string[] { testSubstring }, StringSplitOptions.None)?.Length - 1;
+       testString?.Split(new string[] { testSubstring }, StringSplitOptions.None)?.Length - 1 ?? 0;
 }</lang>