fail to decompile auto-property

[wwh1004]

source:

class A {
	public string value { get; set; }
	public string not_value { get; set; }
}

ilspy:

private class A
{
	public string value
	{
		[CompilerGenerated]
		get
		{
			return <value>k__BackingField;
		}
		[CompilerGenerated]
		set
		{
			this.<value>k__BackingField = value;
		}
	}

	public string not_value
	{
		get;
		set;
	}
}

ilspy version: 6.1.0.5969