Simplify conditional operator

src/coreclr/System.Private.CoreLib/src/System/Diagnostics/StackFrameHelper.cs

@@ -177,7 +177,7 @@ internal void InitializeSourceInfo(bool fNeedFileInfo, Exception? exception)
 
         public bool IsLastFrameFromForeignExceptionStackTrace(int i)
         {
-            return (rgiLastFrameFromForeignExceptionStackTrace == null) ? false : rgiLastFrameFromForeignExceptionStackTrace[i];
+            return rgiLastFrameFromForeignExceptionStackTrace != null && rgiLastFrameFromForeignExceptionStackTrace[i];
         }
 
         public int GetNumberOfFrames() { return iFrameCount; }

src/libraries/System.Private.CoreLib/src/System/Collections/Hashtable.cs

@@ -798,7 +798,7 @@ protected virtual bool KeyEquals(object? item, object key)
 
             if (_keycomparer != null)
                 return _keycomparer.Equals(item, key);
-            return item == null ? false : item.Equals(key);
+            return item != null && item.Equals(key);
         }
 
         // Returns a collection representing the keys of this hashtable. The order

src/libraries/System.Private.CoreLib/src/System/Convert.cs

@@ -314,12 +314,12 @@ internal static object DefaultToType(IConvertible value, Type targetType, IForma
         // Conversions to Boolean
         public static bool ToBoolean([NotNullWhen(true)] object? value)
         {
-            return value == null ? false : ((IConvertible)value).ToBoolean(null);
+            return value != null && ((IConvertible)value).ToBoolean(null);
         }
 
         public static bool ToBoolean([NotNullWhen(true)] object? value, IFormatProvider? provider)
         {
-            return value == null ? false : ((IConvertible)value).ToBoolean(provider);
+            return value != null && ((IConvertible)value).ToBoolean(provider);
         }
 
         public static bool ToBoolean(bool value)

src/libraries/System.Private.CoreLib/src/System/Delegate.cs

@@ -193,7 +193,7 @@ public bool MoveNext()
                 return d1 is null;
             }
 
-            return ReferenceEquals(d2, d1) ? true : d2.Equals((object?)d1);
+            return ReferenceEquals(d2, d1) || d2.Equals(d1);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -206,7 +206,7 @@ public bool MoveNext()
                 return d1 is not null;
             }
 
-            return ReferenceEquals(d2, d1) ? false : !d2.Equals(d1);
+            return !ReferenceEquals(d2, d1) && !d2.Equals(d1);
         }
     }
 }

src/libraries/System.Private.CoreLib/src/System/MulticastDelegate.cs

@@ -35,7 +35,7 @@ protected MulticastDelegate([DynamicallyAccessedMembers(DynamicallyAccessedMembe
                 return d1 is null;
             }
 
-            return ReferenceEquals(d2, d1) ? true : d2.Equals((object?)d1);
+            return ReferenceEquals(d2, d1) || d2.Equals(d1);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -50,7 +50,7 @@ protected MulticastDelegate([DynamicallyAccessedMembers(DynamicallyAccessedMembe
                 return d1 is not null;
             }
 
-            return ReferenceEquals(d2, d1) ? false : !d2.Equals(d1);
+            return !ReferenceEquals(d2, d1) && !d2.Equals(d1);
         }
     }
 #pragma warning restore CS0660, CS0661

src/libraries/System.Private.CoreLib/src/System/Reflection/Assembly.cs

@@ -196,7 +196,7 @@ public override string ToString()
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(Assembly? left, Assembly? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/ConstructorInfo.cs

@@ -37,7 +37,7 @@ protected ConstructorInfo() { }
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(ConstructorInfo? left, ConstructorInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/EventInfo.cs

@@ -92,7 +92,7 @@ public virtual void RemoveEventHandler(object? target, Delegate? handler)
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(EventInfo? left, EventInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/FieldInfo.cs

@@ -56,7 +56,7 @@ protected FieldInfo() { }
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(FieldInfo? left, FieldInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/MemberInfo.cs

@@ -59,7 +59,7 @@ public virtual Module Module
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(MemberInfo? left, MemberInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBase.cs

@@ -81,7 +81,7 @@ this is ConstructorInfo &&
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(MethodBase? left, MethodBase? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/MethodInfo.cs

@@ -54,7 +54,7 @@ protected MethodInfo() { }
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(MethodInfo? left, MethodInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/Module.cs

@@ -161,7 +161,7 @@ public virtual Type[] FindTypes(TypeFilter? filter, object? filterCriteria)
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(Module? left, Module? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Reflection/PropertyInfo.cs

@@ -75,7 +75,7 @@ protected PropertyInfo() { }
                 return true;
             }
 
-            return (left is null) ? false : left.Equals(right);
+            return left is not null && left.Equals(right);
         }
 
         public static bool operator !=(PropertyInfo? left, PropertyInfo? right) => !(left == right);

src/libraries/System.Private.CoreLib/src/System/Type.cs

@@ -599,7 +599,7 @@ protected virtual TypeCode GetTypeCodeImpl()
 
         public virtual InterfaceMapping GetInterfaceMap([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods | DynamicallyAccessedMemberTypes.NonPublicMethods)] Type interfaceType) => throw new NotSupportedException(SR.NotSupported_SubclassOverride);
 
-        public virtual bool IsInstanceOfType([NotNullWhen(true)] object? o) => o == null ? false : IsAssignableFrom(o.GetType());
+        public virtual bool IsInstanceOfType([NotNullWhen(true)] object? o) => o != null && IsAssignableFrom(o.GetType());
         public virtual bool IsEquivalentTo([NotNullWhen(true)] Type? other) => this == other;
 
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2085:UnrecognizedReflectionPattern",
@@ -689,15 +689,15 @@ internal string FormatTypeName()
 
         public override string ToString() => "Type: " + Name;  // Why do we add the "Type: " prefix?
 
-        public override bool Equals(object? o) => o == null ? false : Equals(o as Type);
+        public override bool Equals(object? o) => o != null && Equals(o as Type);
         public override int GetHashCode()
         {
             Type systemType = UnderlyingSystemType;
             if (!ReferenceEquals(systemType, this))
                 return systemType.GetHashCode();
             return base.GetHashCode();
         }
-        public virtual bool Equals(Type? o) => o == null ? false : ReferenceEquals(this.UnderlyingSystemType, o.UnderlyingSystemType);
+        public virtual bool Equals(Type? o) => o != null && ReferenceEquals(this.UnderlyingSystemType, o.UnderlyingSystemType);
 
         [Intrinsic]
         public static bool operator ==(Type? left, Type? right)

src/libraries/System.Private.CoreLib/src/System/Version.cs

@@ -451,7 +451,7 @@ private static bool TryParseComponent<TChar>(ReadOnlySpan<TChar> component, stri
             }
 
             // Quick reference equality test prior to calling the virtual Equality
-            return ReferenceEquals(v2, v1) ? true : v2.Equals(v1);
+            return ReferenceEquals(v2, v1) || v2.Equals(v1);
         }
 
         public static bool operator !=(Version? v1, Version? v2) => !(v1 == v2);