c# - How can I get type double array from List<string>? -

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• how convert list of strings doubles? 5 answers

var array1 = (from ir in pmec.interestrateset               select new list<string> { ir.tenor.tostring() }).tolist();  var array2 = (from ir in pmec.interestrateset               select new list<string> { ir.rate.tostring() }).tolist();  array1.addrange(array2);  var array = array1.toarray(); 

for example, array1 has 6 numbers, array2 has 6 numbers, after combined, array has 12 numbers.

then should in order array of type double?

if tenor , rate double properties should not convert them string.

list<double> tenorlist = pmec.interestrateset     .select(irs => irs.tenor)      .tolist(); list<double> ratelist = pmec.interestrateset     .select(irs => irs.rate)      .tolist(); list<double> tenorratelist = tenorlist.concat(ratelist).tolist(); // or... tenorlist.addrange(ratelist); // modifies first list 

but seems pointless, 12 doubles in sample if have 6 objects in interestrateset. better select both properties @ once:

var tenorratelist = pmec.interestrateset     .select(irs => new { tenor = irs.tenor, rate =irs.rate} )      .tolist(); // list of anonymous type  

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in general, if have string , want convert double use double.parse or double.tryparse.