Declare const arrays in C#

In C#, use readonly to declare a const array.

public static readonly string[] a = { "Car", "Motorbike", "Cab" };

In readonly, unlike const, you can also set the value at runtime.

An alternative way to implement the above is -

public ReadOnlyCollection<string> a { get { return new List<string> { "Car", "Motorbike", "Cab" }.AsReadOnly();}}

.NET Framework 4.5 brings us improvements -

public ReadOnlyCollection<string> a { get; } = new ReadOnlyCollection<string>(
new string[] { "Car", "Motorbike", "Cab" }
);

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