huanlin · March 24, 2020 16:12
diff --git a/NullableDirectives.cs b/NullableDirectives.cs
 #nullable enable    // 啟用 nullable 語法和警告
    string? str1 = null;
 #nullable disable   // 關閉 nullable 語法和警告
    string str2 = null;
diff --git a/NullableDirectives2.cs b/NullableDirectives2.cs
 #nullable enable    
    string str1 = null;   // 編譯警告 CS8600
 #nullable disable   
    string? str2 = null;  // 編譯警告 CS8632
	#nullable enable // 啟用 nullable 語法和警告
	string? str1 = null;
	#nullable disable // 關閉 nullable 語法和警告
	string str2 = null;