Add example for CA1005 rule (#48911)

docs/fundamentals/code-analysis/quality-rules/ca1005.md

@@ -10,6 +10,8 @@ helpviewer_keywords:
 - CA1005
 author: gewarren
 ms.author: gewarren
+dev_langs:
+- CSharp
 ---
 # CA1005: Avoid excessive parameters on generic types
 
@@ -35,6 +37,10 @@ The more type parameters a generic type contains, the more difficult it is to kn
 
 To fix a violation of this rule, change the design to use no more than two type parameters.
 
+## Example
+
+:::code language="csharp" source="snippets/csharp/all-rules/ca1005.cs" id="snippet1":::
+
 ## When to suppress warnings
 
 Do not suppress a warning from this rule unless the design absolutely requires more than two type parameters. Providing generics in a syntax that is easy to understand and use reduces the time that is required to learn and increases the adoption rate of new libraries.

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca1005.cs

@@ -0,0 +1,22 @@
+namespace ca1005
+{
+    //<snippet1>
+    // This class violates the rule.
+    public class TooManyTypeParameters<T, K, V>
+    {
+        public void M1(T t, K k, V v)
+        {
+            // ...
+        }
+    }
+
+    // This class satisfies the rule.
+    public class CorrectTypeParameters<T, K>
+    {
+        public void M1(T t, K k)
+        {
+            // ...
+        }
+    }
+    //</snippet1>
+}