public int Compare(string x, string y)
{
var properties = _entityType.FindPrimaryKey()?.Properties.Select(p => p.Name).ToList();
var xIndex = -1;
var yIndex = -1;
if (properties != null)
{
xIndex = properties.IndexOf(x);
yIndex = properties.IndexOf(y);
}
// Neither property is part of the Primary Key
// Compare the property names
if (xIndex == -1 &&
yIndex == -1)
{
return(StringComparer.Ordinal.Compare(x, y));
}
// Both properties are part of the Primary Key
// Compare the indices
if (xIndex > -1 &&
yIndex > -1)
{
return(xIndex - yIndex);
}
// One property is part of the Primary Key
// The primary key property is first
return((xIndex > yIndex)
? -1
: 1);
}