System.Collections.ArrayList IsReadOnly Property
How to create a read-only copy of the ArrayList
C# Code:
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class Program { static void Main(string[] args) { ArrayList colors = new ArrayList() { "Salmon", "SandyBrown", "Gray" }; Console.WriteLine("ArrayList Elements... "); foreach (string color in colors) { Console.WriteLine(color); } ArrayList readOnlyColors = ArrayList.ReadOnly(colors); Console.WriteLine("\nIs 'colors' ArrayList ReadOnly? " + colors.IsReadOnly.ToString()); Console.WriteLine("Is 'readOnlyColors' ArrayList ReadOnly? " + readOnlyColors.IsReadOnly.ToString()); colors.Add("White"); //Uncomment this line to get error message. //readOnlyColors.Add("White"); Console.WriteLine("\n<font color=DodgerBlue>After Adding 'White', Now 'colors' ArrayList Elements... "); foreach (string color in colors) { Console.WriteLine(color); } Console.ReadLine(); } } |
Output:
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ArrayList Elements... Salmon SandyBrown Gray Is 'colors' ArrayList ReadOnly? False Is 'readOnlyColors' ArrayList ReadOnly? True <font color=DodgerBlue>After Adding 'White', Now 'colors' ArrayList Elements... Salmon SandyBrown Gray White |
