A C# method that I used to remove common assembly information from a AssemblyInfo.cs.

This method was used with a small FileSystem.cs class.

/// <summary>
        /// Remove common assembly info from the given content.
        /// Like:
        /// - AssemblyCompany
        /// - AssemblyCopyright
        /// - AssemblyVersion
        /// - AssemblyFileVersion
        /// </summary>
        public string RemoveCommonAssemblyInfo(string content)
        {
            string result = string.Empty;

            if (!string.IsNullOrWhiteSpace(content))
            {
                result = content;
                var regexes = new List<Regex>();
                regexes.Add(new Regex(@"\r\n\[assembly: AssemblyCompany\(""{1}.*""{1}\)]"));
                regexes.Add(new Regex(@"\r\n\[assembly: AssemblyCopyright\(""{1}.*""{1}\)]"));
                regexes.Add(new Regex(@"\r\n\[assembly: AssemblyVersion\(""{1}.*""{1}\)]"));
                regexes.Add(new Regex(@"\r\n\[assembly: AssemblyFileVersion\(""{1}.*""{1}\)]"));
                regexes.Add(new Regex(@"\r\n\r\n// Version information.*""{1}\)]", RegexOptions.Singleline));

                regexes.ForEach(x =>
                {
                    result = x.Replace(result, string.Empty);
                });
            }

            return result;
        }

namespace Research.Core.Components
{
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Threading.Tasks;
        
    public class FileSystem
    {
        public async Task FindAndReplace(string path, string searchPattern, SearchOption searchOption, 
Func<string, string> updateContent)
        {
            string[] files = await GetFilesAsync(path, searchPattern, searchOption);
            foreach (string file in files)
            {
                string content = await ReadAllTextAsync(file);
                content = updateContent(content);
                await WriteAllTextAsync(file, content);
            }
        }

        public async Task<string[]> GetFilesAsync(string path, string searchPattern, SearchOption searchOption)
        {
            return await Task.Factory.StartNew(() =>
            {
                return Directory.GetFiles(path, searchPattern, searchOption);
            });
        }

        public async Task<string> ReadAllTextAsync(string path)
        {
            string result = await Task.Factory.StartNew(() => { return File.ReadAllText(path); });
            return result;
        }

        public async Task WriteAllTextAsync(string path, string content)
        {
            await Task.Factory.StartNew(() => { File.WriteAllText(path, content); });
        }
    }

    }

To replace all common assembly info found in all AssemblyInfo.cs files in a folder, use the code:

var solution = new VsSolution();
            var fs = new FileSystem();
            Task task = fs.FindAndReplace(@"C:\Projects\Github\roelvanlisdonk\Research\Main", 
"AssemblyInfo.cs", System.IO.SearchOption.AllDirectories, solution.RemoveCommonAssemblyInfo);
            task.Wait();

Code can be found at: https://github.com/roelvanlisdonk/Research