Merge pull request #1 from ozantopal/master

Fix for proper api usage

Author: enisgurkann

EnLock/EnExtention.cs

@@ -1,6 +1,8 @@
 using Microsoft.EntityFrameworkCore;
+using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Transactions;
@@ -69,6 +71,21 @@ public static async Task<T> ToFirstOrDefaultWithNoLockAsync<T>(this IQueryable<T
             }
             return result;
         }
+        public static async Task<T> ToFirstOrDefaultWithNoLockAsync<T>(this IQueryable<T> query, Expression<Func<T, bool>> predicate, CancellationToken cancellationToken = default)
+        {
+            T result = default;
+            using (var scope = new TransactionScope(TransactionScopeOption.Required,
+                                    new TransactionOptions()
+                                    {
+                                        IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted
+                                    },
+                                    TransactionScopeAsyncFlowOption.Enabled))
+            {
+                result = await query.FirstOrDefaultAsync(predicate, cancellationToken);
+                scope.Complete();
+            }
+            return result;
+        }
         public static async Task<T> ToFirstWithNoLockAsync<T>(this IQueryable<T> query, CancellationToken cancellationToken = default)
         {
             T result = default;