using System.IO;

using ICSharpCode.Decompiler;

using ICSharpCode.Decompiler.CSharp;

​

// ...

​

string pathToDll = "path_to_your_dll_file.dll";

string outputPath = "path_to_output_text_file.txt";

​

// Create a new decompiler instance

var decompiler = new CSharpDecompiler(pathToDll, new DecompilerSettings());

​

// Decompile the DLL and get the syntax tree

var syntaxTree = decompiler.DecompileWholeModuleAsSingleFile();

​

// Get the decompiled code as a string

string decompiledCode = syntaxTree.ToString();

​

// Write the decompiled code to a text file

File.WriteAllText(outputPath, decompiledCode);

​