Code Review: Inserting a DBNull value into a database (4 Solutions!!)

Code Review: Inserting a DBNull value into a database (4 Solutions!!)

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C# : Column does not allow DBNull.Value - No KeepNulls - Proper Column Mappings
C# : Column does not allow DBNull.Value - No KeepNulls - Proper Column Mappings
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C# : Column does not allow DBNull.Value - No KeepNulls - Proper Column Mappings

C# : Column does not allow DBNull.Value - No KeepNulls - Proper Column Mappings
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Solve error Object cannot be cast from DBNull to other types in VB.net

Solve error Object cannot be cast from DBNull to other types in VB.net
C# : Unable to cast object of type 'System.DBNull' to type 'System.String`

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Unable to cast object of type 'System DateTime' to type 'System String'

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