Add pragma warning disable 8600, 8605, 8603, 8613, 8619

src/ReactiveUI.Tests/ReactiveObject/Mocks/OaphNameOfTestFixture.cs

@@ -19,8 +19,9 @@ public class OaphNameOfTestFixture : TestFixture
         public OaphNameOfTestFixture()
         {
             this.WhenAnyValue(x => x.IsOnlyOneWord).Select(x => x ?? string.Empty).Select(x => x.Length >= 3 ? x.Substring(0, 3) : x).ToProperty(this, nameof(FirstThreeLettersOfOneWord), out _firstThreeLettersOfOneWord);
-
+#pragma warning disable CS8619 // Nullability of reference types in value doesn't match target type.
             _lastThreeLettersOfOneWord = this.WhenAnyValue(x => x.IsOnlyOneWord).Select(x => x ?? string.Empty).Select(x => x.Length >= 3 ? x.Substring(x.Length - 3, 3) : x).ToProperty(this, nameof(LastThreeLettersOfOneWord));
+#pragma warning restore CS8619 // Nullability of reference types in value doesn't match target type.
         }
 
         [IgnoreDataMember]

src/ReactiveUI.Tests/Routing/Mocks/TestScreen.cs

@@ -18,7 +18,9 @@ public class TestScreen : ReactiveObject, IScreen
         public RoutingState? Router
         {
 #pragma warning disable CS8766 // Nullability of reference types in return type doesn't match implicitly implemented member (possibly because of nullability attributes).
+#pragma warning disable CS8613 // Nullability of reference types in return type doesn't match implicitly implemented member.
             get => _router;
+#pragma warning restore CS8613 // Nullability of reference types in return type doesn't match implicitly implemented member.
 #pragma warning restore CS8766 // Nullability of reference types in return type doesn't match implicitly implemented member (possibly because of nullability attributes).
             set => this.RaiseAndSetIfChanged(ref _router, value);
         }

src/ReactiveUI.Tests/WhenAny/WhenAnyObservableTests.cs

@@ -25,6 +25,7 @@ public void NullObservablesDoNotCauseExceptions()
             fixture.Command1 = null;
 
             // these are the overloads of WhenAnyObservable that perform a Merge
+#pragma warning disable CS8603 // Possible null reference return.
             fixture.WhenAnyObservable(x => x.Command1).Subscribe();
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command1).Subscribe();
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command1, x => x.Command1).Subscribe();
@@ -48,6 +49,7 @@ public void NullObservablesDoNotCauseExceptions()
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, (zero, one, two, three, four, five, six, seven, eight) => Unit.Default).Subscribe();
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, (zero, one, two, three, four, five, six, seven, eight, nine) => Unit.Default).Subscribe();
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, x => x.Command1, (zero, one, two, three, four, five, six, seven, eight, nine, ten) => Unit.Default).Subscribe();
+#pragma warning restore CS8603 // Possible null reference return.
         }
 
         [Fact]
@@ -56,7 +58,9 @@ public async Task WhenAnyObservableSmokeTestCombining()
             var fixture = new TestWhenAnyObsViewModel();
 
             var list = new List<string>();
+#pragma warning disable CS8603 // Possible null reference return.
             fixture.WhenAnyObservable(x => x.Command3, x => x.Command1, (s, i) => s + " : " + i).ObserveOn(ImmediateScheduler.Instance).Subscribe(list.Add);
+#pragma warning restore CS8603 // Possible null reference return.
 
             Assert.Equal(0, list.Count);
 
@@ -86,7 +90,9 @@ public async Task WhenAnyObservableSmokeTestMerging()
             var fixture = new TestWhenAnyObsViewModel();
 
             var list = new List<int>();
+#pragma warning disable CS8603 // Possible null reference return.
             fixture.WhenAnyObservable(x => x.Command1, x => x.Command2).ObserveOn(ImmediateScheduler.Instance).Subscribe(list.Add);
+#pragma warning restore CS8603 // Possible null reference return.
 
             Assert.Equal(0, list.Count);
 
@@ -113,7 +119,9 @@ public async Task WhenAnyObservableSmokeTestMerging()
         public void WhenAnyObservableWithNullObjectShouldUpdateWhenObjectIsntNullAnymore()
         {
             var fixture = new TestWhenAnyObsViewModel();
+#pragma warning disable CS8603 // Possible null reference return.
             fixture.WhenAnyObservable(x => x.Changes).Bind(out var output).ObserveOn(ImmediateScheduler.Instance).Subscribe();
+#pragma warning restore CS8603  // Possible null reference return.
 
             Assert.Equal(0, output.Count);
 

src/ReactiveUI.Uno/CoreDispatcherScheduler.cs

@@ -178,7 +178,9 @@ private IDisposable ScheduleSlow<TState>(TState state, TimeSpan dueTime, Func<IS
                     finally
                     {
                         t.Stop();
+#pragma warning disable CS8600 // Converting null literal or possible null value to non-nullable type.
                         action = null;
+#pragma warning restore CS8600 // Converting null literal or possible null value to non-nullable type.
                     }
                 }
             };

src/ReactiveUI/Bindings/Property/PropertyBinderImplementation.cs

@@ -73,15 +73,19 @@ bool VmToViewFunc(TVMProp vmValue, out TVProp vValue)
             {
                 var result = vmToViewConverter.TryConvert(vmValue, typeof(TVProp), conversionHint, out object? tmp);
 
+#pragma warning disable CS8605 // Unboxing a possibly null value.
                 vValue = result ? (TVProp)tmp : default;
+#pragma warning restore CS8605 // Unboxing a possibly null value.
                 return result;
             }
 
             bool ViewToVmFunc(TVProp vValue, out TVMProp vmValue)
             {
                 var result = viewToVMConverter.TryConvert(vValue, typeof(TVMProp), conversionHint, out object? tmp);
 
+#pragma warning disable CS8605 // Unboxing a possibly null value.
                 vmValue = result ? (TVMProp)tmp : default;
+#pragma warning restore CS8605 // Unboxing a possibly null value.
                 return result;
             }
 #pragma warning restore CS8601 // Possible null reference assignment.

src/ReactiveUI/Expression/Reflection.cs

@@ -249,7 +249,9 @@ public static bool TryGetValueForPropertyChain<TValue>(out TValue changeValue, o
 
             Expression lastExpression = expressions.Last();
 #pragma warning disable CS8601 // Possible null reference assignment.
+#pragma warning disable CS8605 // Unboxing a possibly null value.
             changeValue = (TValue)GetValueFetcherOrThrow(lastExpression.GetMemberInfo())(current, lastExpression.GetArgumentsArray());
+#pragma warning restore CS8605 // Unboxing a possibly null value.
 #pragma warning restore CS8601 // Possible null reference assignment.
             return true;
         }