Is this a valid syntax in C# .NET 4.6.2

Question

public class MyClass
{

    public string DeviceCommands { get; set; } = "DeviceCommands";
}

I have 30 errors on this kind of lines...

Answer 1

.NET 4.6.2 is a framework version, not a language version. To be able to do that line you must be using C# 6 or newer. If you are compiling with C# 6 you would be allowed to use that syntax in a .NET 2.0 project.

If you are using Visual Studio 2015 or newer you are using C# 6 or newer.

If you are using Visual Studio 2015 and are still getting errors there is some other problem with your code that you are not showing us.

UPDATE:

If you are using VS2015 and are getting a error that says

Error CS8026: Feature 'auto property initializer' is not available in C# 5. Please use language version 6 or greater.

That means in your project properties -> Build -> Advanced screen you set the language version manually to 5 or lower instead of default.

Setting it back to default will fix the problem.

Answer 2

The syntax you have are Auto Property Initializers.

It has nothing to do with the .NET Version. It is a language feature from C# 6.0.

You need the the roslyn compiler plattform to make this work.

If you can not support C# 6.0, you could do it the old way:

public class MyClass
{
    public string DeviceCommands { get; set; };

    public MyClass()
    {
        DeviceCommands = "DeviceCommands";
    }
}