Prevent duplicates when overriding

The current code will insert multiple definitions of a method when that method has been overridden.

This change fixes this problem by excluding override methods when generating class definitions, as the base method will always be included in the set of class members

AutomaticInterface/AutomaticInterface/Builder.cs

@@ -69,6 +69,7 @@ InterfaceBuilder codeGenerator
             .Where(x => x.Kind == SymbolKind.Method)
             .OfType<IMethodSymbol>()
             .Where(x => x.DeclaredAccessibility == Accessibility.Public)
+            .Where(x => !x.IsOverride)
             .Where(x => x.MethodKind == MethodKind.Ordinary)
             .Where(x => !x.IsStatic)
             .Where(x => x.ContainingType.Name != nameof(Object))

AutomaticInterface/Tests/GeneratorTests.cs

@@ -2211,4 +2211,53 @@ public partial interface ISecondClass
             """;
         GenerateCode(code).Should().Be(expected);
     }
+
+    [Fact]
+    public void WorksWithOverrides()
+    {
+        const string code = """
+
+            using AutomaticInterfaceAttribute;
+
+            namespace AutomaticInterfaceExample;
+
+            public class BaseClass
+            {
+                public virtual bool AMethod();
+            }
+
+            [GenerateAutomaticInterface]
+            public class DemoClass : BaseClass
+            {
+                public override bool AMethod() => return true;
+            }
+
+            """;
+
+        const string expected = """
+            //--------------------------------------------------------------------------------------------------
+            // <auto-generated>
+            //     This code was generated by a tool.
+            //
+            //     Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+            // </auto-generated>
+            //--------------------------------------------------------------------------------------------------
+
+            using System.CodeDom.Compiler;
+            using AutomaticInterfaceAttribute;
+
+            namespace AutomaticInterfaceExample
+            {
+                [GeneratedCode("AutomaticInterface", "")]
+                public partial interface IDemoClass
+                {
+                    /// <inheritdoc />
+                    bool AMethod();
+                    
+                }
+            }
+
+            """;
+        GenerateCode(code).Should().Be(expected);
+    }
 }