Eltons.ReflectionKit

Rewrite of code I posted here https://stackoverflow.com/a/13318056/222054

This is an extension method on MethodInfo called GetSignature(bool invokable)

Install via nuget

• Eltons.ReflectionKit

Features

• Can generate signatures that are valid in class definitions
  • public static void GetResult(string a, string b)
• Can generate signatures that can be invoked
  • GetResult(a, b)
• Fully qualifies type names
  • Exception becomes System.Exception
• Simplifies types with keywords
  • String becomes string, Nullable<T> becomes T?
• Handles nested generics
  • The following works public List<Dictionary<string, string>> TransformInputs<T>(List<string> inputs)
• Works with extension methods
  • public static string GetName(this User user) or if invokable GetName()
• Works with protection modifiers
  • internal public private protected internal protected

How To

using System;
using Eltons.ReflectionKit;
using System.Collections.Generic;

namespace MyProject
{
    public class App
    {
        public static void Main(string[] args) {
            var type = typeof(App);
            var method = type.GetMethod(nameof(TestMethod));

            // Outputs `public string TestMethod(string firstParam)`
            Console.WriteLine(method.GetSignature(false));
        }
        
        public string TestMethod(string firstParam) {
            throw new NotImplementedException();
        }
    }
}

Examples

For ideas on how to use this, please view the Examples

I've added the Examples.cs class here for a quick reference

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

using System;
using Eltons.ReflectionKit;
using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace Eltons.ReflectionKit.Tests
{
    [TestClass]
    public class Examples
    {
        [TestMethod]
        public void Example_Signature() {
            var type = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod));

            var signature = method.GetSignature(false);

            Assert.AreEqual("public string TestMethod(string firstParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Invokable() {
            var type = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod));

            var signature = method.GetSignature(true);

            Assert.AreEqual("TestMethod(firstParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Generics() {
            var type  = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod2));

            var signature = method.GetSignature(false);

            Assert.AreEqual("public System.Collections.Generic.List<string> TestMethod2<T>(string firstParam, T secondParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Generics_Invokable() {
            var type  = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod2));

            var signature = method.GetSignature(true);

            Assert.AreEqual("TestMethod2<T>(firstParam, secondParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Generics_Nested() {
            var type = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod3));

            var signature = method.GetSignature(false);

            Assert.AreEqual("public void TestMethod3(System.Action<System.Action<System.Action<string>>> firstParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Nullable() {
            var type = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod4));

            var signature = method.GetSignature(false);

            Assert.AreEqual("public void TestMethod4(int? firstParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_Accessor() {
            var type = typeof(Examples);
            var method = type.GetMethod(nameof(TestMethod5), BindingFlags.Static | BindingFlags.NonPublic);

            var signature = method.GetSignature(false);

            Assert.AreEqual("internal static void TestMethod5()", signature);
        }

        [TestMethod]
        public void Example_Signature_ExtensionMethod() {
            var type = typeof(TestExtensionMethods);
            var method = type.GetMethod(nameof(TestExtensionMethods.ExtensionMethod));

            var signature = method.GetSignature(false);

            Assert.AreEqual("public static string ExtensionMethod(this string firstParam, bool secondParam)", signature);
        }

        [TestMethod]
        public void Example_Signature_ExtensionMethod_Invokable() {
            var type = typeof(TestExtensionMethods);
            var method = type.GetMethod(nameof(TestExtensionMethods.ExtensionMethod));

            var signature = method.GetSignature(true);

            Assert.AreEqual("ExtensionMethod(secondParam)", signature);
        }

        public string TestMethod(string firstParam) {
            throw new NotImplementedException();
        }

        public List<string> TestMethod2<T>(string firstParam, T secondParam) {
            throw new NotImplementedException();
        }

        public void TestMethod3(System.Action<System.Action<System.Action<string>>> firstParam) {
            throw new NotImplementedException();
        }

        public void TestMethod4(Nullable<int> firstParam) {
            throw new NotImplementedException();
        }

        internal static void TestMethod5() {

        }
    }

    public static class TestExtensionMethods
    {
        public static string ExtensionMethod(this string firstParam, bool secondParam) {
            throw new NotImplementedException();
        }
    }
}