Night Walker questions

• struct value types
• How do I install Email::Send::Gmail for ActivePerl?
• Merging data frame with overlapping columns
• Distinct in Linq query
• Raising a function by timer
• New line in VB.NET
• back up and restore mysql database c#
• Assign Series to DataFrame by multiindex
• keeping one connection to DB or opening closing per need
• Winform freezes when I try to close it

Night Walker answers