System.Collections.Immutable.ImmutableArray<T>

public struct ImmutableArray<T> : IReadOnlyList<T>, IReadOnlyCollection<T>, IEnumerable<T>, IEnumerable, IList<T>, ICollection<T>, IEquatable<ImmutableArray<T>>, IImmutableList<T>, IList, ICollection, IImmutableArray, IStructuralComparable, IStructuralEquatable

/* Error decompiling System.Collections.Generic.IEnumerator`1 System.Collections.Immutable.ImmutableArray`1/Builder::GetEnumerator() ---> System.InvalidOperationException: Cannot mutate frozen NullBlockStatement at ICSharpCode.Decompiler.CSharp.Syntax.AstNode.AddChild[T](T child, Role`1 role) in offset 36 at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DecompileBody(MethodDefinition methodDefinition, IMethod method, EntityDeclaration entityDecl, DecompileRun decompileRun, ITypeResolveContext decompilationContext) in offset 637 -- continuing with outer exception (ICSharpCode.Decompiler.DecompilerException) -- at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DecompileBody(MethodDefinition methodDefinition, IMethod method, EntityDeclaration entityDecl, DecompileRun decompileRun, ITypeResolveContext decompilationContext) in offset 835 at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DoDecompile(ITypeDefinition typeDef, DecompileRun decompileRun, ITypeResolveContext decompilationContext) in offset 567 at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DoDecompile(ITypeDefinition typeDef, DecompileRun decompileRun, ITypeResolveContext decompilationContext) in offset 84 at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DoDecompileTypes(IEnumerable`1 types, DecompileRun decompileRun, ITypeResolveContext decompilationContext, SyntaxTree syntaxTree) in offset 154 at ICSharpCode.Decompiler.CSharp.CSharpDecompiler.DecompileType(FullTypeName fullTypeName) in offset 141 at Relativity.APIReference.TypeDocumentation.b__30_0() in TypeDocumentation.cs:line 270 */