Labels are not shown correctly in WPF 2010 - xaml

Question

I have a TabControl which has four labels. Its xaml is:
![enter image description here][1]<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TabControl Height="282" HorizontalAlignment="Left" Name="tabControl1"
VerticalAlignment="Top" Width="503">
<TabItem Header="tabItem1" Name="tabItem1">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition Height="50"/>
<RowDefinition Height="50"/>
<RowDefinition Height="101*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="367"/>
<ColumnDefinition Width="125*" />
</Grid.ColumnDefinitions>
<Label Content="Library:" Height="28" HorizontalAlignment="Left" Margin="309,15,0,0" Name="label1" VerticalAlignment="Top" Width="49" />
<Label Content="Museum:" Height="28" HorizontalAlignment="Left" Margin="303,13,0,0" Name="label2" VerticalAlignment="Top" Width="58" Grid.Row="1" />
<Label Content="Cinema:" Height="28" HorizontalAlignment="Left" Margin="309,11,0,0" Name="label3" VerticalAlignment="Top" Width="50" Grid.Row="2" />
<Label Content="Embankment:" Height="28" HorizontalAlignment="Left" Margin="281,30,0,0" Name="label4" VerticalAlignment="Top" Width="81" Grid.Row="3" />
</Grid>
</TabItem>
</TabControl>
</Grid>
When a program is run then some letters, signs are disappeared and I cannot understand the reason why. For example, in this screen shot it can be seen that colon of word “Cinema” is not drawn.
I made a grid, however, it does not help. What should I do to make my program work? It happens very often. I want all my labels to show correctly.
It can be seen that a colon of a word “Cinema” is not drawn.

Answer 1

try removing the "Width" of the labels and allow the content to size the control
<Grid>
<TabControl Height="282" HorizontalAlignment="Left" Name="tabControl1"
VerticalAlignment="Top" Width="503">
<TabItem Header="tabItem1" Name="tabItem1">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition Height="50"/>
<RowDefinition Height="50"/>
<RowDefinition Height="101*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="367"/>
<ColumnDefinition Width="125*" />
</Grid.ColumnDefinitions>
<Label Content="Library:" Height="28" HorizontalAlignment="Left" Margin="309,15,0,0" Name="label1" VerticalAlignment="Top" />
<Label Content="Museum:" Height="28" HorizontalAlignment="Left" Margin="303,13,0,0" Name="label2" VerticalAlignment="Top" Grid.Row="1" />
<Label Content="Cinema:" Height="28" HorizontalAlignment="Left" Margin="309,11,0,0" Name="label3" VerticalAlignment="Top" Grid.Row="2" />
<Label Content="Embankment:" Height="28" HorizontalAlignment="Left" Margin="281,30,0,0" Name="label4" VerticalAlignment="Top" Grid.Row="3" />
</Grid>
</TabItem>
</TabControl>
</Grid>