#1,060 – Explicit Conversions between Nullable Types

An implicit conversion exists between two nullable types if an implicit conversion exists between the corresponding value types.  For example:

int i = 12;
long l = i;  // implicit int to long
int? i2 = 12;
long? l2 = i2;  // implicit int? to long?

Similarly, an explicit conversion exists between two nullable types if an explicit conversion exists between the corresponding value types.

long l = 12;
int i = (int)l;  // explicit long to int
long? l2 = 12;
int? i2 = (int?)l2;  // explicit long? to int?

You can also convert between a nullable and non-nullable type, either implicitly or explicitly.  An explicit conversion is required when converting from a nullable type to a non-nullable type or when an explicit conversion is required by the underlying types.

            int? i3 = (int?)l;   // explicit long to int?
            long l3 = (long)i3;  // explicit int? to long
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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #1,060 – Explicit Conversions between Nullable Types

  1. Pingback: Dew Drop – March 25, 2014 (#1750) | Morning Dew

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