Added support for running benchmarks without baseline.

Recyclable.Collections.Benchmarks/Benchmarks/RecyclableCollections.Benchmarks.cs

@@ -66,7 +66,7 @@ namespace Recyclable.Collections.Benchmarks
 		)]
 		public override RecyclableCollectionsBenchmarkSource BenchmarkType { get => base.BenchmarkType; set => base.BenchmarkType = value; }
 
-		protected override Action GetTestMethod(RecyclableCollectionsBenchmarkSource benchmarkType)
+		protected override Action? GetTestMethod(RecyclableCollectionsBenchmarkSource benchmarkType)
 			=> (Action?) GetType().GetMethod($"{benchmarkType}_{TestCase}", BindingFlags.Instance | BindingFlags.Public)?.CreateDelegate(typeof(Action), this)
 			?? throw CreateMethodNotFoundException($"{benchmarkType}_{TestCase}", GetType().FullName);
 	}

Recyclable.Collections.Benchmarks/POC/PocBenchmarkBase.cs

@@ -94,7 +94,7 @@ namespace Recyclable.Collections.Benchmarks.POC
 		{
 			Console.WriteLine($"******* SETTING UP TEST CASE FOR BENCHMARK {{{BenchmarkType}}} *******");
 
-			if (BaselineBenchmarkType != null)
+			if (!EqualityComparer<TBenchmarkType>.Default.Equals(BaselineBenchmarkType, default))
 			{
 				Console.WriteLine("******* SETTING UP BASELINE DATA *******");
 				PrepareData(BaselineBenchmarkType);

Recyclable.Collections.Benchmarks/RecyclableBenchmarkBase.cs

@@ -52,6 +52,9 @@ namespace Recyclable.Collections.Benchmarks
 			Console.WriteLine($"******* PREPARING DATA FOR {benchmarkType} *******");
 			switch (benchmarkType)
 			{
+				case RecyclableCollectionsBenchmarkSource.Unknown:
+					break;
+
 				case RecyclableCollectionsBenchmarkSource.Array:
 					_testObjects ??= DataGenerator.EnumerateTestObjects(TestObjectCount);
 					break;