diff --git a/CSharp.gitignore b/CSharp.gitignore
index bdc3535f745bc86966fb24c67d252c3ea68e8e03..389262bc1d59bab1e3a09d4f4668c953d8cc8849 100644
--- a/CSharp.gitignore
+++ b/CSharp.gitignore
@@ -106,3 +106,7 @@ Generated_Code #added for RIA/Silverlight projects
 _UpgradeReport_Files/
 Backup*/
 UpgradeLog*.XML
+
+# SQL Server files
+App_Data/*.mdf
+App_Data/*.ldf