Added prerequisites in description

Signed-off-by: Prabha Kylasamiyer Sundara Rajan <pkylasam@pkylasam-thinkpadp16vgen1.bengluru.csb>

Author: Prabha Kylasamiyer Sundara Rajan

docs/topics/rules-development/create-csharp-custom-rule.adoc

@@ -11,6 +11,12 @@ You can create custom rules for `C#` applications based on the following example
 
 You can use the following custom rule to check if {ProductShortName} triggers an incident when it detects the `WebMatrix.WebData.WebSecurity` class in the `nerd-dinner` example project.
 
+.Prerequisites
+
+* You installed `.NET` SDK 9.x or higher
+* You installed `ilspycmd` and `paket` for dependency analysis
+* You exported the dotnet tools path by using the `export PATH="$PATH:<path/to/.dotnet/tools"` command
+
 .Procedure
 . Create a `csharp-rule.yaml` file in your `Home` directory. 
 

docs/topics/rules-development/yaml-dotnet-provider.adoc

@@ -11,6 +11,8 @@ The `csharp` provider is an external provider used to analyze `.NET` and `C#` so
 
 The `csharp` provider uses a gRPC interface to perform a semantic analysis of an application source code. The provider parses the code by using tree-sitter and uses stack graph for the analysis to find references to types, methods, classes, and fields. Based on the `C#` rule defenition, the analyzer identifies violations in your code that you must resolve before the application migration. 
 
+The `csharp` provider you to install `.NET` software development kit (SDK) 9.x or higher and optionally, the dotnet compiler `ilspycmd` and the packet manager `paket` for dependency analysis.
+
 .`referenced`
 
 The `csharp` provider supports `referenced` capability in rules to define fields such as `pattern`,`location` and `file_path` based on which the provider searches the code for violations.