LINQ to Object (Load Dictionary/HashTable from DataTable)

Code to load data of DataTable in the Dictionary object (Considering there atleast one column which is containing unique values).

Consider a dictionary dicDetail which is to be loaded by the values available in a data table. I am considering that a table dtSample is containing 2 columns(RollNo, Name). Now our task is to load the data in the dictionary dicDetail. In which RollNo will be key and Name will be value.