diff --git a/exceptions/Exception.go b/exceptions/Exception.go
index d4aeb3e..889cc45 100644
--- a/exceptions/Exception.go
+++ b/exceptions/Exception.go
@@ -11,6 +11,8 @@ import (
 	"io"
 	"os"
 	"strings"
+
+	"github.com/tursom/GoCollections/lang"
 )
 
 type Exception interface {
@@ -18,13 +20,13 @@ type Exception interface {
 	Error() string
 	Name() string
 	Message() string
-	StackTrace() []StackTrace
+	StackTrace() []lang.StackTrace
 	PrintStackTrace()
 	PrintStackTraceTo(writer io.Writer)
 	BuildPrintStackTrace(builder *strings.Builder)
 }
 
-func PrintStackTraceByArray(writer io.Writer, trace []StackTrace) {
+func PrintStackTraceByArray(writer io.Writer, trace []lang.StackTrace) {
 	if trace == nil {
 		return
 	}
@@ -44,7 +46,7 @@ func PrintStackTraceByArray(writer io.Writer, trace []StackTrace) {
 	}
 }
 
-func BuildStackTraceByArray(builder *strings.Builder, trace []StackTrace) {
+func BuildStackTraceByArray(builder *strings.Builder, trace []lang.StackTrace) {
 	if trace == nil {
 		return
 	}
@@ -95,7 +97,7 @@ func Print(err error) {
 		err.(Exception).PrintStackTrace()
 	default:
 		_, _ = fmt.Fprintln(os.Stderr, err)
-		PrintStackTraceByArray(os.Stderr, GetStackTrace())
+		PrintStackTraceByArray(os.Stderr, lang.GetStackTrace())
 	}
 }
 
diff --git a/exceptions/RuntimeException.go b/exceptions/RuntimeException.go
index e395bc3..6976744 100644
--- a/exceptions/RuntimeException.go
+++ b/exceptions/RuntimeException.go
@@ -19,7 +19,7 @@ type RuntimeException struct {
 	lang.BaseObject
 	message       string
 	exceptionName string
-	stackTrace    []StackTrace
+	stackTrace    []lang.StackTrace
 	cause         Exception
 }
 
@@ -28,9 +28,9 @@ func NewRuntimeException(message string, config *ExceptionConfig) RuntimeExcepti
 		config = DefaultExceptionConfig()
 	}
 
-	var stackTrace []StackTrace = nil
+	var stackTrace []lang.StackTrace = nil
 	if config.GetStackTrace {
-		stackTrace = GetStackTraceSkipDeep(config.SkipStack + 1)
+		stackTrace = lang.GetStackTraceSkipDeep(config.SkipStack + 1)
 	}
 
 	var causeException Exception = nil
@@ -84,7 +84,7 @@ func (o RuntimeException) Name() string {
 	return o.exceptionName
 }
 
-func (o RuntimeException) StackTrace() []StackTrace {
+func (o RuntimeException) StackTrace() []lang.StackTrace {
 	return o.stackTrace
 }
 
diff --git a/lang/Lang.go b/lang/Lang.go
index 9699869..08865a8 100644
--- a/lang/Lang.go
+++ b/lang/Lang.go
@@ -6,7 +6,22 @@
 
 package lang
 
-import "unsafe"
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"unsafe"
+
+	"github.com/tursom/GoCollections/exceptions"
+)
+
+type TypeCastException struct {
+	BaseObject
+	message    string
+	stackTrace []StackTrace
+	cause      any
+}
 
 func Nil[T any]() T {
 	var n T
@@ -31,6 +46,17 @@ func TryCast[T any](v any) (T, bool) {
 }
 
 func Cast[T any](v any) T {
+	defer func() {
+		r := recover()
+		if r != nil {
+			panic(&TypeCastException{
+				message:    "cast failed",
+				stackTrace: GetStackTraceSkipDeep(1),
+				cause:      r,
+			})
+		}
+	}()
+
 	if v == nil {
 		return Nil[T]()
 	} else {
@@ -39,9 +65,63 @@ func Cast[T any](v any) T {
 }
 
 func ForceCast[T any](v unsafe.Pointer) *T {
+	defer func() {
+		r := recover()
+		if r != nil {
+			panic(&TypeCastException{
+				message:    "cast failed",
+				stackTrace: GetStackTraceSkipDeep(1),
+				cause:      r,
+			})
+		}
+	}()
+
 	if v == nil {
 		return nil
 	} else {
 		return (*T)(v)
 	}
 }
+
+func (t *TypeCastException) Cause() exceptions.Exception {
+	return nil
+}
+
+func (t *TypeCastException) Error() string {
+	return fmt.Sprintf("TypeCastException: %s\ncause by: %s", t.message, t.cause)
+}
+
+func (t *TypeCastException) Name() string {
+	return "github.com.tursom.GoCollections.lang.TypeCastException"
+}
+
+func (t *TypeCastException) Message() string {
+	return t.message
+}
+
+func (t *TypeCastException) StackTrace() []StackTrace {
+	return t.stackTrace
+}
+
+func (t *TypeCastException) PrintStackTrace() {
+	t.PrintStackTraceTo(os.Stderr)
+}
+
+func (t *TypeCastException) PrintStackTraceTo(writer io.Writer) {
+	builder := strings.Builder{}
+	t.BuildPrintStackTrace(&builder)
+	bytes := []byte(builder.String())
+	writeBytes := 0
+	_, _ = writer.Write(bytes[writeBytes:])
+}
+
+func (t *TypeCastException) BuildPrintStackTrace(builder *strings.Builder) {
+	builder.WriteString(t.Error())
+	builder.WriteString("\n")
+	if t.StackTrace() == nil {
+		return
+	}
+	for _, stackTrace := range t.StackTrace() {
+		stackTrace.WriteTo(builder)
+	}
+}
diff --git a/exceptions/StackTrace.go b/lang/StackTrace.go
similarity index 98%
rename from exceptions/StackTrace.go
rename to lang/StackTrace.go
index 7e6006e..5b22665 100644
--- a/exceptions/StackTrace.go
+++ b/lang/StackTrace.go
@@ -4,7 +4,7 @@
  * license that can be found in the LICENSE file.
  */
 
-package exceptions
+package lang
 
 import (
 	"fmt"
diff --git a/exceptions/StackTrace_test.go b/lang/StackTrace_test.go
similarity index 95%
rename from exceptions/StackTrace_test.go
rename to lang/StackTrace_test.go
index dc9b697..9060673 100644
--- a/exceptions/StackTrace_test.go
+++ b/lang/StackTrace_test.go
@@ -4,7 +4,7 @@
  * license that can be found in the LICENSE file.
  */
 
-package exceptions
+package lang
 
 import (
 	"fmt"