Sinstraliz

//x => x.fieldName.Contains(fieldValue)
public static IQueryable<T> FilterByValue<T>(this IQueryable<T> q, string fieldName, string fieldValue)
{
	try
	{
		var param = Expression.Parameter(typeof(T), "p");
		var prop = Expression.Property(param, fieldName);

		if (((PropertyInfo)prop.Member).PropertyType != typeof(string))
			return q;

Sinstraliz

public static class GuidIntConverter
{
	public static Guid ToGuid(int integer)
	{
		return new GuidConverter(integer).Guid;
	}

	public static int ToInt(Guid guid)
	{
		return new GuidConverter(guid).Integer;