Invalid token '=' in class, struct, or interface member declaration c#

Question

this may be a simple question for people, but I can\'t see why this is occurring. here is my code 1st:

using System;
using System.Collections.Generic;
using         


        

Answer 1

It looks like this error happens due to version your MSBuild, old version of MSBuild can only compile C# version 4, while your code written in C# version 6 format (set default value for properties).

Example of code writing in C# version 6:

 public static string HostName { get; set; } = ConfigurationManager.AppSettings["RabbitMQHostName"] ?? "";

For MSBuild to compile your code, you need to write in C# 4 style

public static string HostName { get; set; }
public SomeConstructor()
        {
            HostName = ConfigurationManager.AppSettings["RabbitMQHostName"] ?? "";... }

Or

 public static string HostName
        {
            get
            {
                return ConfigurationManager.AppSettings["RabbitMQHostName"] ?? "";
            }
        }

Hope it helps