using System;

using System.Linq;

using System.Linq.Expressions;

using System.Collections.Generic;

​

public class Simple {

  public static void Main() {

    string[] names = { "Burke", "Laptop", "Computer", 

                       "Mobile", "Ahemed", "Sania", 

                       "Kungada", "David","United","Sinshia" };

​

    Random rnd = new Random();

    bool isAnd = false;

    List<Expression<Func<string,bool>>> expressionList = new List<Expression<Func<string,bool>>> {

        s => s == "Burke",

        s => s.StartsWith("S")

    };

    Expression<Func<string,bool>> finalExpression = null;

    foreach(var exp in expressionList){

        if(finalExpression == null){

            finalExpression = exp;

        }else {

            if(isAnd){

                finalExpression = Expression.Lambda<Func<string, bool>>(Expression.AndAlso(

                    new SwapVisitor(finalExpression.Parameters[0], exp.Parameters[0]).Visit(finalExpression.Body),

                    exp.Body), exp.Parameters);

            }else{

                finalExpression = Expression.Lambda<Func<string, bool>>(Expression.OrElse(

                    new SwapVisitor(finalExpression.Parameters[0], exp.Parameters[0]).Visit(finalExpression.Body),

                    exp.Body), exp.Parameters);

            }

        }

    }

    var  query = names.AsQueryable().Where(finalExpression);

    foreach (string item in query.ToList())

      Console.WriteLine(item);

  }

}

​

class SwapVisitor : ExpressionVisitor

{

    private readonly Expression from, to;

    public SwapVisitor(Expression from, Expression to)

    {

        this.from = from;

        this.to = to;

    }

    public override Expression Visit(Expression node)

    {

        return node == from ? to : base.Visit(node);

    }

}