- 增加 IUpdate.WhereCaseSource 方法，实现批量修改时的条件判断；

- 增加 FreeSql.DbContext 行级锁；

FreeSql.DbContext/Extenssions/DependencyInjection.cs

@@ -0,0 +1,26 @@
+using Microsoft.Extensions.DependencyInjection;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace FreeSql {
+	public static class DbContextDependencyInjection {
+
+		public static IServiceCollection AddFreeDbContext<TDbContext>(this IServiceCollection services, Action<DbContextOptionsBuilder> options) where TDbContext : DbContext {
+
+			services.AddScoped<TDbContext>(sp => {
+				var ctx = Activator.CreateInstance<TDbContext>();
+
+				if (ctx._orm == null) {
+					var builder = new DbContextOptionsBuilder();
+					options(builder);
+					ctx._orm = builder._fsql;
+				}
+
+				return ctx;
+			});
+
+			return services;
+		}
+	}
+}