MyAccountFinal2.cs

public class MyEntity : Entity
{
    protected string GetAttributeName(string propertyName)
    {
        return this.GetType().GetProperties().FirstOrDefault(p => p.Name == propertyName).GetCustomAttribute<AttributeLogicalNameAttribute>().LogicalName;
    }

    protected T GetAttribute<T>([CallerMemberName]string propertyName = null)
    {
        return this.GetAttributeValue<T>(GetAttributeName(propertyName));
    }

    protected void SetAttribute(object value, [CallerMemberName]string propertyName = null)
    {
        this.SetAttributeValue(GetAttributeName(propertyName), value);
    }
}

[EntityLogicalName("account")]
public class MyAccount : MyEntity
{
    public MyAccount()
    {
        this.LogicalName = typeof(MyAccount).GetCustomAttribute<EntityLogicalNameAttribute>().LogicalName;
    }

    [AttributeLogicalName("odx_clientcode")]
    public string ClientCode
    {
        get => GetAttribute<string>();
        set => SetAttribute(value);
    }
}