Add LocalisableString.Concat() and LocalisableString.Join() - #6838

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicProperties' in call to 'System.Type.GetProperty(String, BindingFlags)'. The return value of method 'System.Object.GetType()' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicProperties' in call to 'System.Type.GetProperty(String, BindingFlags)'. The return value of method 'System.Object.GetType()' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetField(String, BindingFlags)'. The return value of method 'System.Object.GetType()' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetField(String, BindingFlags)'. The return value of method 'System.Object.GetType()' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicParameterlessConstructor' in call to 'System.Activator.CreateInstance(Type)'. The parameter 'containerType' of method 'osu.Framework.Tests.Containers.ContainerEnumerableTest.TestAddingContainerAsEnumerableRangeThrows(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicParameterlessConstructor' in call to 'System.Activator.CreateInstance(Type)'. The parameter 'containerType' of method 'osu.Framework.Tests.Containers.ContainerEnumerableTest.TestAddingContainerAsEnumerableRangeThrows(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicParameterlessConstructor' in call to 'System.Activator.CreateInstance(Type)'. The parameter 'containerType' of method 'osu.Framework.Tests.Containers.ContainerEnumerableTest.TestAddingContainerAsEnumerableRangeThrows(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicParameterlessConstructor' in call to 'System.Activator.CreateInstance(Type)'. The parameter 'containerType' of method 'osu.Framework.Tests.Containers.ContainerEnumerableTest.TestAddingContainerAsEnumerableRangeThrows(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicParameterlessConstructor' in call to 'System.Activator.CreateInstance(Type)'. The field 'osu.Framework.Tests.Exceptions.TestSceneDependencyInjectionExceptions.Thrower.exceptionType' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.