Old LinqPad version (2.42.01) throws "Lambda Parameter not in scope" and problems in new version.

Anton · April 2013

Hi.

I have folloing C# code:

void Main()
{
 var strings = new[] { "d", "test", "m", "s"};
 
 Expression<Func<HighWays, bool>> predicate = o => false;

 foreach (string s in strings)
 {
   string s1 = s;
   Expression<Func<HighWays, bool>> filter = o => o.Name.Contains(s1);
 predicate = Expression.Lambda<Func<HighWays, bool>>(Expression.Or(predicate.Body,         filter.Body),predicate.Parameters);
}
var query = HighWays.Where(predicate).Count();
		
}

Version 2.42.01 throws InvalidOPeratiopnException "Lambda Parameter not in scope".

Version 4.44.09 (beta) throws "variable 'o' of type 'LINQPad.User.HighWays' referenced from scope '', but it is not defined".

HighWays is a simple table with two columns -- id and some string name.

Meanwhile on .net 4.0 it works great.

What I'm doing wrong in LinqPad?

Thanks in advance.

Old LinqPad version (2.42.01) throws "Lambda Parameter not in scope" and problems in new version.

Categories