The CSS attributes on the master page are not displayed.

Here, I will write down some bugs about setting CSS attributes in Asp.net (not achieving the expected results ),

1. Max-heigth, Max-width, Min-width, Min-heigth
   If float is set for the outer container, the Min-heigth is used as an example when the container loads dynamic content,
   <Div> top </div>
   <Div> content <div> dynamic </div>
   <Div> foot </div>

# Content
{
Min-Height: 300px;
}
# Dynamic
{
Float: left;
Min-Height: 300px;
}

After the content is opened, the content background will not be copied. The correct method is to use position: absolute or relative;

Use the width and height of Max and min to enlarge the image.

<Div class = "Demo"> <A> </a> </div>

. Demo
{
Min-width: 100px;
}
. Demo img
{
Width: 100px;
}
. Demo A: hover img
{
Width: auto;
}

When CSS problems are detected, update them and remember to forget them.