score:1
Accepted answer
Use Expression.Call
var containsMethod = typeof(string).GetMethod(nameof(string.Contains), new[] {typeof(string)});
var predicate = Expression.Lambda<Func<Book, bool>>(
Expression.Call(
Expression.PropertyOrField(parameter, filterAfter)
, containsMethod
, new Expression[] { Expression.Constant(filterField) }
)
, parameter
);
Source: stackoverflow.com
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