Starts-With Query

List<Product> products = await asyncSession
    .Query<Product>()
     // Call 'StartsWith' on the field
     // Pass the prefix to search by
    .Where(x => x.Name.StartsWith("Ch"))
    .ToListAsync();

// Results will contain only Product documents having a 'Name' field
// that starts with any case variation of 'ch'

List<Product> products = session.Advanced
    .DocumentQuery<Product>()
     // Call 'WhereStartsWith'
     // Pass the document field and the prefix to search by
    .WhereStartsWith(x => x.Name, "Ch")
    .ToList();

// Results will contain only Product documents having a 'Name' field
// that starts with any case variation of 'ch'

from "Products"
where startsWith(Name, "Ch")

List<Product> products = await asyncSession
    .Query<Product>()
     // Pass 'exact: true' to search for an EXACT prefix match
    .Where(x => x.Name.StartsWith("Ch"), exact: true)
    .ToListAsync();

// Results will contain only Product documents having a 'Name' field
// that starts with 'Ch'

List<Product> products = session.Advanced
    .DocumentQuery<Product>()
     // Call 'WhereStartsWith'
     // Pass 'exact: true' to search for an EXACT prefix match
    .WhereStartsWith(x => x.Name, "Ch", exact: true)
    .ToList();

// Results will contain only Product documents having a 'Name' field
// that starts with 'Ch'

from "Products"
where exact(startsWith(Name, "Ch"))

List<Product> products = await asyncSession
    .Query<Product>()
     // Call 'StartsWith' on the field
     // Pass the prefix to search by
    .Where(x => x.Name.StartsWith("Ch") == false)
    .ToListAsync();

// Results will contain only Product documents having a 'Name' field
// that does NOT start with 'ch' or any other case variations of it

List<Product> products = session.Advanced
    .DocumentQuery<Product>()
     // Call 'Not' to negate the next predicate
    .Not
     // Call 'WhereStartsWith'
     // Pass the document field and the prefix to search by
    .WhereStartsWith(x => x.Name, "Ch")
    .ToList();

// Results will contain only Product documents having a 'Name' field
// that does NOT start with 'ch' or any other case variations of it

from "Products"
where (true and not startsWith(Name, "Ch"))