How to create inner / sub query using lambda expressions - entity-framework

Question

Given the following query (with inner query) needs be build up fully dynamic.
set
.Where(
x => x.PersonNr == "1" &&
x.WeightMeasurement == set.Where(y => y.PersonNr == "1").Select(z => z.WeightMeasurement).Max()
)
As first step I try to build up the example using linq expressions. However, I facing issues on the following line. Please help me out here:
Expression callSetSelect = Expression.Call(typeof(DynamicQueryableExtensions), "Select", new[] { dtoType, typeof(string) }, callSetWhere, lambdaSelect);
Exception:
System.InvalidOperationException : No generic method 'Select' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic.
The query build up using expressions
// x
ParameterExpression personOuterWhere = Expression.Parameter(dtoType, "x");
// x.PersonNr
MemberExpression personOuterPersonNr = Expression.Property(personOuterWhere, "PersonNr");
// x.WeightMeasurement
MemberExpression personWeightMeasurement = Expression.Property(personOuterWhere, "WeightMeasurement");
// x.PersonNr == "1"
Expression personOuterWherePersonNrEquals = Expression.Equal(personOuterPersonNr, Expression.Constant("1"));
// y
ParameterExpression personInnerWhere = Expression.Parameter(dtoType, "y");
// y.PersonNr
MemberExpression personInnerWherePersonNr = Expression.Property(personInnerWhere, "PersonNr");
// y.PersonNr == "1"
Expression personInnerWherePersonNrEquals = Expression.Equal(personInnerWherePersonNr, Expression.Constant("1"));
// y => y.PersonNr == "1"
LambdaExpression lambdaWhere = Expression.Lambda(personInnerWherePersonNrEquals, personInnerWhere);
// .Where(y => y.PersonNr == "1")
Expression callSetWhere = Expression.Call(typeof(Enumerable), "Where", new[] { dtoType }, Expression.Constant(set), lambdaWhere);
// z
ParameterExpression personInnerSelect = Expression.Parameter(dtoType, "z");
// z.WeightMeasurement
MemberExpression personInnerSelectWeightMeasurement = Expression.Property(personInnerSelect, "WeightMeasurement");
// z => z.WeightMeasurement
LambdaExpression lambdaSelect = Expression.Lambda(personInnerSelectWeightMeasurement, personInnerSelect);
// .Select(z => z.WeightMeasurement)
Expression callSetSelect = Expression.Call(typeof(DynamicQueryableExtensions), "Select", new[] { dtoType, typeof(string) }, callSetWhere, lambdaSelect);
//// .Max()
Expression callSetMax = Expression.Call(typeof(Enumerable), "Max", new[] { typeof(object) }, callSetSelect);
// set.Where(y => y.PersonNr == "1").Select(z => z.WeightMeasurement).Max()
Expression innerQuery = Expression.Lambda(callSetMax);
// x.WeightMeasurement == set.Where(y => y.PersonNr == "1").Select(z => z.WeightMeasurement).Max()
Expression weightMeasurementEqualsInnerQuery = Expression.Equal(personWeightMeasurement, innerQuery);
// x.PersonNr == "1" && x.WeightMeasurement == set.Where(y => y.PersonNr == "1").Select(z => z.WeightMeasurement).Max()
Expression outerWhereExpression = Expression.And(personOuterWherePersonNrEquals, weightMeasurementEqualsInnerQuery);
// x => x.PersonNr == "1" && x.WeightMeasurement == set.Where(y => y.PersonNr == "1").Select(z => z.WeightMeasurement).Max()
LambdaExpression lambdaOuterWhere = Expression.Lambda(outerWhereExpression, personOuterWhere);
return set.Where(lambdaOuterWhere);