C#开源实用的工具类库，集成超过1000多种扩展方法

public static partial class Extensions
{
    /// <summary>
    /// A Stream extension method that converts the @this to a md 5 hash.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>@this as a string.</returns>
    public static string ToMD5Hash(this Stream @this)
    {
        using (MD5 md5 = MD5.Create())
        {
            byte[] hashBytes = md5.ComputeHash(@this);
            var sb = new StringBuilder();
            foreach (byte bytes in hashBytes)
            {
                sb.Append(bytes.ToString("X2"));
            }
            return sb.ToString();
        }
    }
}

public static partial class Extensions
{
    /// <summary>
    /// A byte[] extension method that decompress the byte array gzip to string.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>The byte array gzip to string.</returns>
    public static string DecompressGZip(this byte[] @this)
    {
        const int bufferSize = 1024;
        using (var memoryStream = new MemoryStream(@this))
        {
            using (var zipStream = new GZipStream(memoryStream, CompressionMode.Decompress))
            {
                // Memory stream for storing the decompressed bytes
                using (var outStream = new MemoryStream())
                {
                    var buffer = new byte[bufferSize];
                    int totalBytes = 0;
                    int readBytes;
                    while ((readBytes = zipStream.Read(buffer, 0, bufferSize)) > 0)
                    {
                        outStream.Write(buffer, 0, readBytes);
                        totalBytes += readBytes;
                    }
                    return Encoding.Default.GetString(outStream.GetBuffer(), 0, totalBytes);
                }
            }
        }
    }
    /// <summary>
    /// A byte[] extension method that decompress the byte array gzip to string.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <param name="encoding">The encoding.</param>
    /// <returns>The byte array gzip to string.</returns>
    public static string DecompressGZip(this byte[] @this, Encoding encoding)
    {
        const int bufferSize = 1024;
        using (var memoryStream = new MemoryStream(@this))
        {
            using (var zipStream = new GZipStream(memoryStream, CompressionMode.Decompress))
            {
                // Memory stream for storing the decompressed bytes
                using (var outStream = new MemoryStream())
                {
                    var buffer = new byte[bufferSize];
                    int totalBytes = 0;
                    int readBytes;
                    while ((readBytes = zipStream.Read(buffer, 0, bufferSize)) > 0)
                    {
                        outStream.Write(buffer, 0, readBytes);
                        totalBytes += readBytes;
                    }
                    return encoding.GetString(outStream.GetBuffer(), 0, totalBytes);
                }
            }
        }
    }
}

public static partial class Extensions
{
    /// <summary>
    /// A T[] extension method that converts the @this to a data table.
    /// </summary>
    /// <typeparam name="T">Generic type parameter.</typeparam>
    /// <param name="this">The @this to act on.</param>
    /// <returns>@this as a DataTable.</returns>
    public static DataTable ToDataTable<T>(this T[] @this)
    {
        Type type = typeof (T);
        PropertyInfo[] properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
        FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.Instance);
        var dt = new DataTable();
        foreach (PropertyInfo property in properties)
        {
            dt.Columns.Add(property.Name, property.PropertyType);
        }
        foreach (FieldInfo field in fields)
        {
            dt.Columns.Add(field.Name, field.FieldType);
        }
        foreach (T item in @this)
        {
            DataRow dr = dt.NewRow();
            foreach (PropertyInfo property in properties)
            {
                dr[property.Name] = property.GetValue(item, null);
            }
            foreach (FieldInfo field in fields)
            {
                dr[field.Name] = field.GetValue(item);
            }
            dt.Rows.Add(dr);
        }
        return dt;
    }
}