css - I cannot re-size uploaded image in MVC - razor view -

actually want display image in default uploaded image size.

this code in view.

<div class="uploadbannerforcourse">     <img class="absolutedisplaysize" src="~/file?id=@model.files.first(f => f.filetype == smartjob.domain.models.professioncoursemodels.filetype.avatar).fileid" alt="avatar" height="" /> </div> 

this css file.

.uploadbannerforcourse{     overflow:hidden;     position: relative;     height: 50px;     width:50px; }  img.absolutedisplaysize{     left: 50%;     margin-left: -200px;     position:absolute;  }