diff --git a/CSharp.gitignore b/CSharp.gitignore
index bdc3535f..6f0d2c35 100644
--- a/CSharp.gitignore
+++ b/CSharp.gitignore
@@ -55,6 +55,9 @@ ipch/
 # ReSharper is a .NET coding add-in
 _ReSharper*
 
+# TeamCity is a CI server with an add-in for Visual Studio
+_TeamCity*
+
 # NCrunch
 *.ncrunch*
 .*crunch*.local.xml