C # obtain the source code of the browser type

/// <Summary>
/// Obtain the character Jia Shiyi of the browser type
/// </Summary>
/// <Param name = "Browser"> </param>
/// <Returns> ff (firfox) SF (Safari) oe (opera) IE </returns>
Public static string getbrowser (httpbrowsercapabilities browser)
{
If (Browser = NULL)
{
Return "ie ";
}
Else if (browser. browser. indexof ("ie", stringcomparison. currentcultureignorecase )! =-1)
{
Return "ie ";
}
If (browser. browser. indexof ("Firefox", stringcomparison. currentcultureignorecase )! =-1)
{
Return "FF ";
}
Else if (browser. browser. indexof ("safari", stringcomparison. currentcultureignorecase )! =-1)
{
Return "SF ";
}
Else if (browser. browser. indexof ("Opera", stringcomparison. currentcultureignorecase )! =-1)
{
Return "oe ";
}
Else
{
Return "ie ";
}
}
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