Add check message

Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/LogicDeleteProvider.cs

@@ -135,6 +135,9 @@ namespace SqlSugar
         {
             var entityInfo = Deleteable.EntityInfo;
             db = Deleteable.Context;
+            
+            Check.ExceptionEasy(DeleteBuilder.GetWhereString == null,"Logical Delete requires a Where condition", "逻辑删除需要加Where条件");
+            
             where = DeleteBuilder.GetWhereString.Substring(5);
             pars = DeleteBuilder.Parameters;
             if (LogicFieldName.IsNullOrEmpty())