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How to write an inline big string in F#
string myBigString = @"

<someXmlForInstance>
  <someChild />
</someXmlForInstance>

";

let xaml = """
<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            Name="mainPanel">
  <Border BorderThickness="15.0" BorderBrush="Black">
    <StackPanel Name="stackPanel1">
      <TextBlock Text="Super BreakAway!" FontSize="24" HorizontalAlignment="Center" />
      <TextBlock Text="written in F#, by Brian McNamara - press 'p' to pause"
                 FontSize="12" HorizontalAlignment="Center" />
      <Border BorderThickness="2.0" BorderBrush="Black">
        <Canvas Name="canvas" Background="White" />
      </Border>
    </StackPanel>
  </Border>
</StackPanel>"""

let str1 = "abc
     def"
let str2 = "abc
     def"