Anonymous Types are read-only in C#

Published on June 21, 2015 by abundantcode

Filed under LINQ

Last modified June 21, 2015

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If you try to set a value to the anonymous type in C# , you will receive an compiler error . The properties within the anonymous types are read-only properties.

Anonymous Types are read-only in C#

using System;
namespace AbundantCodeConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var employee = new { FirstName = "Abundant", Last = "Code.com" };
            employee.FirstName = "Lot of Code"; // This will show the compiler error
            Console.WriteLine(employee.ToString());
            Console.ReadLine();
        }
     
    }
}

In the above code snippet , you will receive an compiler error “Error    CS0200    Property or indexer ‘<anonymous type: string FirstName, string Last>.FirstName’ cannot be assigned to — it is read only    AbundantCodeConsoleApp” when you set a value for the properties FirtName or LastName of the employee(anonymous type).

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