From cbf6c4fb622d836fc3410058619b42125deab600 Mon Sep 17 00:00:00 2001
From: mrsh <marshalovecode@gmail.com>
Date: Mon, 12 Jan 2026 03:27:32 +0100
Subject: [PATCH] pause at 53minutes

---
 C# Full Course for free/Strings methods.md | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 C# Full Course for free/Strings methods.md

diff --git a/C# Full Course for free/Strings methods.md b/C# Full Course for free/Strings methods.md
new file mode 100644
index 0000000..8ba8860
--- /dev/null
+++ b/C# Full Course for free/Strings methods.md	
@@ -0,0 +1,49 @@
+# String method
+
+## ToUpper
+
+set strings uppercase
+
+```C#
+String fullName = "mrsh"; 
+fullName = fullName.ToUpper();
+
+```
+
+## Tolower
+
+set strings lowercase
+
+```C#
+String fullName = "mrsh"; 
+fullName = fullName.ToLower();
+```
+
+## Replace
+
+```C#
+String phoneNumber = "123-456-789"; 
+phoneNumber.Replace("-", "/");
+```
+
+## Insert
+
+```C#
+String fullName = "mrsh online"; 
+userName = fullName.Insert(0, "@");
+```
+
+## Length
+
+```C#
+String fullName = "mrsh online"; 
+fullName.Length();
+```
+
+## Substring
+
+```C#
+String fullName = "mrsh online"; 
+String firstName = fullName.Substring(0,4); 
+String lastName = fullName.Substring(5,6); 
+```