using System;

using SqlKata;

using SqlKata.Compilers;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        List<Group> groups = new List<Group>

        {

            new Group

            {

                Conditions = new List<Condition>

                {

                    new Condition {Field = "Group1Field1", Operator = "=", Value="Group1Value1"},

                    new Condition {Field = "Group1Field2", Operator = ">", Value="Group1Value2"},

                    new Condition {Field = "Group1Field3", Operator = "<", Value="Group1Value3"},

                    new Condition {Field = "Group1Field4", Operator = "=", Value="Group1Value4"}

                }

            },

            new Group

            {

                Conditions = new List<Condition>

                {

                    new Condition {Field = "Group2Field1", Operator = "=", Value="Group2Value1"},

                    new Condition {Field = "Group2Field2", Operator = ">=", Value="Group2Value2"},

                    new Condition {Field = "Group2Field3", Operator = "<=", Value="Group2Value3"}

                }

            }

        };

        var query = new Query("Countries");

        foreach (Group group in groups)

            foreach (Condition c in group.Conditions)

                query.OrWhere(c.Field, c.Operator, c.Value);

        Console.WriteLine(new SqlServerCompiler().Compile(query).Sql);

    }

}

​

class Group

{

    public List<Condition> Conditions { get; set; }

}

​

class Condition

{

    public string Field { get; set; }

    public string Operator { get; set; }

    public object Value { get; set; }

}

​