Using Reflection to Get Class Property Information returning nothing

I have been tasked with updating a large number of records that all have the same data type and want to write this in such a way I don't have to find every class object and do them manually. Therefore, I thought the best way of doing this would be using reflection using PropertyInfo.

Prior to asking this question I have looked at the following;

Getting ALL the properties of an object How to get the list of properties of a class? https://www.codegrepper.com/code-examples/csharp/c%23+get+all+class+properties https://docs.microsoft.com/en-us/dotnet/api/system.type.getproperties?view=net-5.0

looking at this, suggested I'm on the right approach, but for the life of me Im not getting the results.

The code is as follows

void Main()
{
    var propeties =  typeof(MaterialsStructure).GetProperties(BindingFlags.Public | BindingFlags.Static);

}

public class MaterialsStructure
{
    public ExistingProposedDescriptionStructure boundariesField;

    public ExistingProposedDescriptionStructure ceilingsField;
}

public class ExistingProposedDescriptionStructure
{

    public string Existing { get; set; }
    public string Proposed { get; set; }
    public bool NotApplicable { get; set; }
    public bool DontKnow { get; set; } 
}

The problem is that when I inspect properties it has 0 items in the array, where I would have expected it to have two properties of type ExistingProposedDescriptionStructure. I would be grateful if someone could show me where I have gone wrong here.