Update UpdateFilter/InsertFilter example

Author: mythz

README.md

@@ -1992,14 +1992,12 @@ public interface IAudit
 }
 
 OrmLiteConfig.InsertFilter = (dbCmd, row) => {
-    var auditRow = row as IAudit;
-    if (auditRow != null)
+    if (row is IAudit auditRow)
         auditRow.CreatedDate = auditRow.ModifiedDate = DateTime.UtcNow;
 };
 
 OrmLiteConfig.UpdateFilter = (dbCmd, row) => {
-    var auditRow = row as IAudit;
-    if (auditRow != null)
+    if (row is IAudit auditRow)
         auditRow.ModifiedDate = DateTime.UtcNow;
 };
 ```
@@ -2012,8 +2010,7 @@ The filters can also be used for validation where throwing an exception will pre
 
 ```csharp
 OrmLiteConfig.InsertFilter = OrmLiteConfig.UpdateFilter = (dbCmd, row) => {
-    var auditRow = row as IAudit;
-    if (auditRow != null && auditRow.ModifiedBy == null)
+    if (row is IAudit auditRow && auditRow.ModifiedBy == null)
         throw new ArgumentNullException("ModifiedBy");
 };
 

tests/ServiceStack.OrmLite.Tests/OrmLiteFiltersTests.cs

@@ -97,17 +97,15 @@ public void Does_call_Filters_on_Save()
 
             OrmLiteConfig.InsertFilter = (dbCmd, row) =>
             {
-                var auditRow = row as IAudit;
-                if (auditRow != null)
+                if (row is IAudit auditRow)
                 {
                     auditRow.CreatedDate = auditRow.ModifiedDate = insertDate;
                 }
             };
 
             OrmLiteConfig.UpdateFilter = (dbCmd, row) =>
             {
-                var auditRow = row as IAudit;
-                if (auditRow != null)
+                if (row is IAudit auditRow)
                 {
                     auditRow.ModifiedDate = updateDate;
                 }
@@ -147,8 +145,7 @@ public void Exceptions_in_filters_prevents_insert_and_update()
         {
             OrmLiteConfig.InsertFilter = OrmLiteConfig.UpdateFilter = (dbCmd, row) =>
             {
-                var auditRow = row as IAudit;
-                if (auditRow != null)
+                if (row is IAudit auditRow)
                 {
                     if (auditRow.ModifiedBy == null)
                         throw new ArgumentNullException("ModifiedBy");