添加项目文件。

common/Tnb.Common/Extension/StreamExtensions.cs

@@ -0,0 +1,27 @@
+using JNPF.DependencyInjection;
+using System.Text;
+
+namespace JNPF.Common.Extension;
+
+/// <summary>
+/// Stream扩展方法.
+/// </summary>
+[SuppressSniffer]
+public static class StreamExtensions
+{
+    /// <summary>
+    /// 把<see cref="Stream"/>转换为<see cref="string"/>.
+    /// </summary>
+    public static string ToString2(this Stream stream, Encoding? encoding = null)
+    {
+        if (encoding == null)
+        {
+            encoding = Encoding.UTF8;
+        }
+
+        using (StreamReader reader = new StreamReader(stream, encoding))
+        {
+            return reader.ReadToEnd();
+        }
+    }
+}