Use "DateTime.UnixEpoch" instead of creating DateTime instances that point to the unix epoch time (https://rules.sonarsource.com/csharp/RSPEC-6588)

Define a constant instead of using this literal 'Cannot apply assignment operator '{0}' (x << y) to operands of type '{1}'.' 6 times. (https://rules.sonarsource.com/csharp/RSPEC-1192)

Define a constant instead of using this literal 'Cannot apply assignment operator '{0}' (x >> y) to operands of type '{1}'.' 6 times. (https://rules.sonarsource.com/csharp/RSPEC-1192)

Indexing at Count-1 should be used instead of the "Enumerable" extension method "Last" (https://rules.sonarsource.com/csharp/RSPEC-6608)

Define a constant instead of using this literal 'Value is not in a valid state.' 4 times. (https://rules.sonarsource.com/csharp/RSPEC-1192)

Make sure that using this pseudorandom number generator is safe here. (https://rules.sonarsource.com/csharp/RSPEC-2245)

Use a comparison to 'default(TKey)' instead or add a constraint to 'TKey' so that it can't be a value type. (https://rules.sonarsource.com/csharp/RSPEC-2955)

Use a comparison to 'default(TKey)' instead or add a constraint to 'TKey' so that it can't be a value type. (https://rules.sonarsource.com/csharp/RSPEC-2955)

The collection-specific "TrueForAll" method should be used instead of the "All" extension (https://rules.sonarsource.com/csharp/RSPEC-6603)