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How to add read-only property in C#?
A field marked "read-only", can only be set once during the construction of an object. It cannot be changed −
Let us see an example.
class Employee { readonly int salary; Employee(int salary) { this.salary = salary; } void UpdateSalary() { //salary = 50000; // Compile error } }
Above, we have set the salary field as read-only.
If you will change it, then a compile-time error will occur. The same is shown in the above example.
Let us now see how to check whether an array is read-only or not −
Example
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace lower { class Program { static void Main(string[] args) { Array arr = Array.CreateInstance(typeof(String), 3); arr.SetValue("Maths", 0); arr.SetValue("Science", 1); arr.SetValue("PHP", 2); Console.WriteLine("isReadOnly: {0}",arr.IsReadOnly.ToString()); } } }
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