Defined basic interface

FastRng/IRandom.cs

@@ -0,0 +1,16 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FastRng
+{
+    public interface IRandom
+    {
+        public Task<uint> NextNumber(uint rangeStart, uint rangeEnd, CancellationToken cancel = default(CancellationToken));
+        
+        public Task<ulong> NextNumber(ulong rangeStart, ulong rangeEnd, CancellationToken cancel = default(CancellationToken));
+        
+        public Task<float> NextNumber(float rangeStart, float rangeEnd, CancellationToken cancel = default(CancellationToken));
+
+        public void StopProducer();
+    }
+}