concatenate string array into string with spaces .net code example

Example 1: c# object list to joined string

using System.Linq

string.Join(",", people.Select(x => x.surname))

Example 2: c# array.join

String Array...
AB
BC
CD
DE
EF
FG
GH
IJ
Result (after joining) = AB*BC*CD*DE*EF*FG*GH*IJ