diff --git a/Dotnet.gitignore b/Dotnet.gitignore
index 35063fc7..7282dbf2 100644
--- a/Dotnet.gitignore
+++ b/Dotnet.gitignore
@@ -36,6 +36,9 @@ ScaffoldingReadMe.txt
 # NuGet Symbol Packages
 *.snupkg
 
+# dotenv environment variables file
+.env
+
 # Others
 ~$*
 *~
@@ -51,4 +54,4 @@ CodeCoverage/
 # NUnit
 *.VisualState.xml
 TestResult.xml
-nunit-*.xml
\ No newline at end of file
+nunit-*.xml
diff --git a/Global/JetBrains.gitignore b/Global/JetBrains.gitignore
index a69eea4d..0c1302b4 100644
--- a/Global/JetBrains.gitignore
+++ b/Global/JetBrains.gitignore
@@ -81,3 +81,6 @@ http-client.private.env.json
 # Apifox Helper cache
 .idea/.cache/.Apifox_Helper
 .idea/ApifoxUploaderProjectSetting.xml
+
+# Github Copilot persisted session migrations, see: https://github.com/microsoft/copilot-intellij-feedback/issues/712#issuecomment-3322062215
+.idea/**/copilot.data.migration.*.xml