How to check whether. NET 2.0 and. Net 3.0 [ZT] are installed?

Code Paintdotnet. systemlayer. OS class from paint. net

This code checks the entries in the registry to determine whether. NET 2.0/3.0 is installed. Since paint. Net was developed by Microsoft employees, it can be considered as a more accurate method.

Private   Static   Bool Isdotnet2versioninstalled ( Int Major, Int Minor, Int Build)
{
Const   String Regkeynameformat =   " SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v {0}. {1}. {2} " ;
Const   String Regvaluename =   " Install " ;

String Regkeyname =   String . Format (regkeynameformat, Major. tostring (cultureinfo. invariantculture ),
Minor. tostring (cultureinfo. invariantculture), build. tostring (cultureinfo. invariantculture ));

Return Checkforregvalueequals1 (regvaluename, regkeyname );
}

Private   Static   Bool Isdotnet3versioninstalled ( Int Major, Int Minor, Int Build)
{
Bool Result =   False ;

Const   String Regvaluename =   " Installsuccess " ;

If ( ! Result)
{
Const   String Regkeynameformat =   " SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v {0}. {1} \ setup " ;
String Regkeyname =   String . Format (regkeynameformat, Major, minor );

Result | = Checkforregvalueequals1 (regkeyname, regvaluename );
}

If ( ! Result)
{
// There seems to be a bug in x64. Net 3.0 where it only records its success in the 32-bit Section of the Registry.
Const   String Regkeynameformat2 =   " Software \ wow6432node \ Microsoft \ Net Framework Setup \ NDP \ v {0}. {1} \ setup " ;
String Regkeyname2 =   String . Format (regkeynameformat2, Major, minor );

Result | = Checkforregvalueequals1 (regkeyname2, regvaluename );
}

Return Result;
}

Private   Static   Bool Checkforregvalueequals1 ( String Regkeyname, String Regvaluename)
{
Using (Registrykey key = Registry. localmachine. opensubkey (regkeyname, False ))
{
Object Value =   Null ;

If (Key ! =   Null )
{
Value=Key. getvalue (regvaluename );
}

Return (Value ! =   Null   && Value Is   Int   && ( Int ) Value =   1 );
}
}