Write Text File: Value cannot be null. Parameter name: source

[ppr (Peter Preuss)]

@pauloengenharia5

String.Join(Environment.NewLine, dt.AsEnumerable().select(function() ((“SAP Code”).toString)).ToList)

for a flatten string we would do like below:

String.Join(Environment.NewLine, dt.AsEnumerable().select(function(x) x("SAP Code").toString).ToList)