C#•2y ago

How to define an Anonymous type lambda parameter in Linq Expression

0 I had found in a stackoverflow post how they created an anonymous object but I would like to create a Lambda expression which select only a field within an object to be able to Group by Id currently the coude from here Linq: Group by multiple columns using Expression-tree syntax creates a new type but I would like that it could be able to work on GroupBy linq method....

  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName =  typeof(Program).Assembly.GetName();
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

  public static Type CreateNewType(List<PropertyInfo> props)
        {
            AssemblyName asmName =  typeof(Program).Assembly.GetName();
            AssemblyBuilder dynamicAssembly = AssemblyBuilder
                .DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAsm");
            TypeBuilder dynamicAnonymousType = dynamicModule
                .DefineType("MyType", TypeAttributes.Public);

            foreach (var p in props)
            {
                dynamicAnonymousType.DefineField(p.Name, p.PropertyType, FieldAttributes.Public);
            }
            return dynamicAnonymousType.CreateType();
        }

using this type using a single field(I only need the field rather the class... groups by an entity MyType which doesnt exist...it should group by either of the entities/fields in my class linq.net-coresystem.reflection

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How to define an Anonymous type lambda parameter in Linq Expression