C# Error CS0110 – The evaluation of the constant value for ‘const declaration’ involves a circular definition

C# Compiler Error

CS0110 – The evaluation of the constant value for ‘const declaration’ involves a circular definition

Reason for the Error

You will receive this error when you declare a constant which references another constant that also references the previously declared constant (Eg : cyclic or circular definition).

For example, lets look at the below code snippet.

public class DeveloperPublish
{
    public const int constant1 = constant2;
    public const int constant2 = constant1;
    public static void Main()
    {

    }
}

The class contains two constant variables declared and one references the other. This results in the CS0110 error.

Error CS0110 The evaluation of the constant value for ‘DeveloperPublish.constant1’ involves a circular definition ConsoleApp1 C:\Users\Senthil\source\repos\ConsoleApp1\ConsoleApp1\Program.cs 3 Active

C# Error CS0110 – The evaluation of the constant value for 'const declaration' involves a circular definition

Solution

To fix the above error, remove the circular definition and provide right values for the constant variables.