csharp edits

Author: stayseesong

src/_data/sidenav/strat.yml

@@ -203,3 +203,11 @@ sections:
     title: Analytics-Node.js Classic
   - path: /connections/sources/catalog/libraries/server/node/migration/
     title: Analytics-Node.js Migration Guide
+
+- slug: csharp
+  section_title: Analytics-CSharp Documentation
+  section: 
+  - path: 
+    title: 
+  - path: 
+    title: 

src/connections/sources/catalog/libraries/server/c-sharp/migration-guide.md

@@ -0,0 +1,80 @@
+---
+title: Analytics for CSharp (C#)
+strat: csharp
+---
+
+If you’re using a different library such as Analytics .Net, follow these steps to migrate to the Analytics-CSharp library: 
+
+1. Create a source in Segment. If you want to reuse your current source, skip to step 2. 
+    1. Go to Connections > Sources > Add Source.
+    2. Search for Xamarin or Unity or .NET and click Add source.
+2. Add the Analytics CSharp dependency to your project. 
+
+    <br> Before:
+    ```js
+    dotnet add package Analytics --version <VERSION>
+    ```
+
+    <br>After
+    ```js
+    dotnet add package Segment.Analytics.CSharp --version <VERSION>
+    ```
+
+3. Modify your tracking methods. 
+    - Identify
+
+      <br> Before example
+      ```c#    
+        Analytics.Client.Identify("019mr8mf4r", new Traits() {
+            { "name", "#{ user.name }" },
+            { "email", "#{ user.email }" },
+            { "friends", 29 }
+        });
+      ```
+
+      <br> After example
+      ```c#    
+        // compatbile with the old way
+        analytics.Identify("019mr8mf4r", new JsonObject()
+        {
+            { "name", "#{ user.name }" },
+            { "email", "#{ user.email }" },
+            { "friends", 29 }
+        });
+
+        // below is the new way
+        analytics.Identify("019mr8mf4r", new JsonObject
+        {
+            ["name"] = "#{user.name}",
+            ["email"] = "#{user.email}",
+            ["friends"] = 29
+        });
+      ```
+
+    - Track
+        <br> Before example
+        ```c#    
+            Analytics.Client.Track("019mr8mf4r", "Item Purchased", new Properties() {
+                { "revenue", 39.95 },
+                { "shipping", "2-day" }
+            });
+        ```
+
+        <br> After example
+        ```c#
+        // compatbile with the old way
+        analytics.Track("Item Purchased", new JsonObject()
+        {
+            { "revenue", 39.95 },
+            { "shipping", "2-day" }
+        });
+
+        // below is the new way
+        analytics.Track("Item Purchased", new JsonObject
+        {
+            ["revenue"] = 39.95,
+            ["shipping"] = "2-days"
+        });
+        ```
+        **Note:** 
+