Crappy way to detect Primary Keys in EF4

ef4_pk_detect.cs

//Get all fields marked as Primary Key
var keyFields = type.GetProperties()
                    .Where(prop => prop.GetCustomAttributes(typeof(KeyAttribute), true).Any())
                    .Select(prop => prop.Name)
                    .ToList();
//Get all fields that end with Id and Not marked as Foreign Key
keyFields.AddRange(type.GetProperties()
                        .Where(prop =>
                            prop.Name.EndsWith("Id", true, CultureInfo.InvariantCulture)
                            && !prop.GetCustomAttributes(typeof(ForeignKeyAttribute), true).Any()
                        )
                        .Select(prop => prop.Name));

//Remove all keys which have their FK attribute on the Navigation Property
var fkMiss = type.GetProperties()
    .Where(prop => !prop.Name.EndsWith("Id", StringComparison.InvariantCultureIgnoreCase))
    .Select(prop => Attribute.GetCustomAttributes(prop, typeof(ForeignKeyAttribute)).Cast<ForeignKeyAttribute>().Select(x => x.Name).ToList()).SelectMany(x => x).ToList();
keyFields = keyFields.Except(fkMiss).ToList();