rename files to use dashes, add rename script, update readme

.scripts/convertAndReplaceAll.bat

@@ -1,3 +1,4 @@
+wsl bash renamePptx.sh
 call convertPptxToMd.bat
 REN img imgs
 

.scripts/renamePptx.sh

@@ -0,0 +1,3 @@
+for f in *.pptx; do
+  mv -- "$f" "$(echo "$f" | tr '[:upper:]' '[:lower:]' | tr ' ' '-')"
+done

15-design-patterns-in-csharp-slides.html

@@ -32,7 +32,7 @@
 </li>
 <li data-marpit-fragment="3">While a static class could be used for this, there are some problems:
 <ul>
-<li data-marpit-fragment="4">As stated in <a href="10.%20Static%20Members,%20Methods%20and%20Classes.md#StaticClasses">lecture 10</a>, static classes can only have static members</li>
+<li data-marpit-fragment="4">As stated in <a href="10-static-members-methods-and-classes#StaticClasses">lecture 10</a>, static classes can only have static members</li>
 <li data-marpit-fragment="5">Static classes cannot be instantiated, so a reference to them cannot be passed around as a parameter</li>
 <li data-marpit-fragment="6">Static classes cannot inherit from other classes or implement interfaces</li>
 <li data-marpit-fragment="7"><a href="https://www.c-sharpcorner.com/UploadFile/akkiraju/singleton-vs-static-classes/">And many more... </a></li>

15-design-patterns-in-csharp.md

@@ -23,7 +23,7 @@ title: 15. Design Patterns in C#
 * In most cases, it makes no sense to create an instance of a class every time its members need to be accessed
   * For example, a shared resource manager that is being called from multiple classes
 * While a static class could be used for this, there are some problems:
-  * As stated in [lecture 10](10.%20Static%20Members,%20Methods%20and%20Classes.md#StaticClasses), static classes can only have static members
+  * As stated in [lecture 10](10-static-members-methods-and-classes#StaticClasses), static classes can only have static members
   * Static classes cannot be instantiated, so a reference to them cannot be passed around as a parameter
   * Static classes cannot inherit from other classes or implement interfaces
   * [And many more... ](https://www.c-sharpcorner.com/UploadFile/akkiraju/singleton-vs-static-classes/)

README.md

@@ -2,8 +2,9 @@
 
 Material completion denoted with 🌑🌘🌗🌖🌕 .
 
-|    # | Lecture                               | Materials | Exercises |
-| ---: | ------------------------------------- | --------: | --------: |
-|    13 | [Generics, IEnumberable and LINQ](13.%20Generics,%20IEnumerable%20and%20LINQ.md) |         🌕 |         🌕 |
-|    14 | [Exceptions, Threads and Tasks](14.%20Exceptions,%20Threads%20and%20Tasks.md) |         🌕 |         🌕 |
-|    15 | [Design Patterns in C#](15.%20Design%20Patterns%20in%20C#.md) |         🌗 |         🌑 |
+|  # | Lecture                                                                | Materials | Exercises |
+|---:|------------------------------------------------------------------------|----------:|----------:|
+| 12 | [Files and Streams](12-files-and-streams.md)                           |        🌕 |        🌕 |
+| 13 | [Generics, IEnumberable and LINQ](13-generics-ienumerable-and-linq.md) |        🌕 |        🌕 |
+| 14 | [Exceptions, Threads and Tasks](14-exceptions-threads-and-tasks.md)    |        🌕 |        🌕 |
+| 15 | [Design Patterns in C#](15-design-patterns-in-csharp.md)               |        🌗 |        🌑 |