Add project files.

PoweredSoft.DynamicLinq/Extensions/QueryableExtensions.cs

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+using PoweredSoft.DynamicLinq.Fluent;
+using PoweredSoft.DynamicLinq.Helpers;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PoweredSoft.DynamicLinq.Extensions
+{
+    public static class QueryableExtensions
+    {
+        public static IQueryable<T> Where<T>(this IQueryable<T> query, string path, ConditionOperators conditionOperator, object value, bool convertConstantToLeftOperator = true)
+        {
+            query = query.Query(qb => qb.Compare(path, conditionOperator, value, convertConstantToLeftOperator: convertConstantToLeftOperator));
+            return query;
+        }
+        
+        public static IQueryable<T> Query<T> (this IQueryable<T> query, Action<QueryBuilder<T>> callback)
+        {
+            var queryBuilder = new QueryBuilder<T>(query);
+            callback(queryBuilder);
+            var ret = queryBuilder.Build();
+            return ret;
+        }
+    }
+}