Baksteen.Extensions.WhereNotNull

This package contains a pair of IEnumerable extension methods named WhereNotNull(). The method skips all null elements from a sequence. This is useful for projects that have nullable reference types enabled because it converts IEnumerable<T?> into IEnumerable<T> .

How to use:

For nullable reference types:

using Baksteen.Extensions.WhereNotNull;
...
var seq = new string?[] { "one", null, "two", null, null, "three", null, null, null }
var result = seq.WhereNotNull();
// the result is IEnumerable<string> { "one", "two", "three" }

For nullable value types:

using Baksteen.Extensions.WhereNotNull;
...
var seq = new int?[] { 1, null, 2, null, null, 3, null, null, null }
var result = seq.WhereNotNull();
// the result is IEnumerable<int> { 1, 2, 3 }

See also

For more insight on the rationale of this extension, see:

• dotnet/runtime#30381
• https://stackoverflow.com/questions/59431558/using-linqs-where-select-to-filter-out-null-and-convert-the-type-to-non-nullabl