C# 错误捕捉

     if (!ModelState.IsValid)
         {
            List<string> sb = new
       List<string>();
              //获取所有错误的Key
            List<string> Keys = ModelState.Keys.ToList();
              //获取每一个key对应的ModelStateDictionary
                foreach (var key in Keys)
                {
                   var errors = ModelState[key].Errors.ToList();
                  //将错误描述添加到sb中
                    foreach (var error in errors)
                  {
                       sb.Add(error.ErrorMessage);
                }
             }
               return Json(sb);
           }  

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }