diff --git a/Module2/SimpleLexerDemo/app.config b/Module2/SimpleLexerDemo/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module2/SimpleLexerDemo/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module3/app.config b/Module3/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module3/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module4/SimpleLangParserTest/app.config b/Module4/SimpleLangParserTest/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module4/SimpleLangParserTest/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module5/app.config b/Module5/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module5/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module6/app.config b/Module6/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module6/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module7/app.config b/Module7/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module7/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
diff --git a/Module8/app.config b/Module8/app.config
new file mode 100644
index 0000000000000000000000000000000000000000..fcd0c9373599da3670c1db785b6d1ccafa462e53
--- /dev/null
+++ b/Module8/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>