diff --git a/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/ArgumentDefinition.cs b/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/ArgumentDefinition.cs
index 7dda538078d..6c7e62bd102 100644
--- a/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/ArgumentDefinition.cs
+++ b/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/ArgumentDefinition.cs
@@ -11,6 +11,7 @@
 using Microsoft.TypeSpec.Generator.Statements;
 using static Microsoft.TypeSpec.Generator.Snippets.ArgumentSnippets;
 using static Microsoft.TypeSpec.Generator.Snippets.Snippet;
+using static Microsoft.TypeSpec.Generator.Snippets.StringSnippets;
 
 namespace Microsoft.TypeSpec.Generator.Providers
 {
@@ -20,6 +21,9 @@ private class Template<T> { }
 
         private const string AssertNotNullMethodName = "AssertNotNull";
         private const string AssertNotNullOrEmptyMethodName = "AssertNotNullOrEmpty";
+        private const string AssertNotNullOrWhiteSpaceMethodName = "AssertNotNullOrWhiteSpace";
+        private const string AssertInRangeMethodName = "AssertInRange";
+        private const string CheckNotNullOrEmptyMethodName = "CheckNotNullOrEmpty";
 
         private readonly CSharpType _t = typeof(Template<>).GetGenericArguments()[0];
         private readonly ParameterProvider _nameParam = new ParameterProvider("name", $"The name.", typeof(string));
@@ -65,9 +69,60 @@ protected internal override MethodProvider[] BuildMethods()
                 BuildAssertNotNullStruct(),
                 BuildAssertNotNullOrEmptyCollection(),
                 BuildAssertNotNullOrEmptyString(),
+                BuildAssertNotNullOrWhiteSpace(),
+                BuildAssertInRange(),
+                BuildCheckNotNullOrEmpty(),
             ];
         }
 
+        private MethodProvider BuildAssertNotNullOrWhiteSpace()
+        {
+            var valueParam = new ParameterProvider("value", $"The value.", typeof(string));
+            var signature = GetSignature(AssertNotNullOrWhiteSpaceMethodName, [valueParam, _nameParam]);
+            return new MethodProvider(signature, new MethodBodyStatement[]
+            {
+                AssertNotNullSnippet(valueParam),
+                new IfStatement(IsNullOrWhiteSpace(valueParam.As<string>()))
+                {
+                    ThrowArgumentException("Value cannot be empty or contain only white-space characters.")
+                }
+            },
+            this);
+        }
+
+        private MethodProvider BuildAssertInRange()
+        {
+            var valueParam = new ParameterProvider("value", $"The value.", _t);
+            var minimumParam = new ParameterProvider("minimum", $"The minimum value.", _t);
+            var maximumParam = new ParameterProvider("maximum", $"The maximum value.", _t);
+            var whereExpression = Where.NotNull(_t).And(new CSharpType(typeof(IComparable<>), _t));
+            var signature = GetSignature(AssertInRangeMethodName, [valueParam, minimumParam, maximumParam, _nameParam], [_t], [whereExpression]);
+            return new MethodProvider(signature, new MethodBodyStatement[]
+            {
+                new IfStatement(minimumParam.Invoke("CompareTo", valueParam).GreaterThan(Literal(0)))
+                {
+                    Throw(New.ArgumentOutOfRangeException(_nameParam, "Value is less than the minimum allowed.", false))
+                },
+                new IfStatement(maximumParam.Invoke("CompareTo", valueParam).LessThan(Literal(0)))
+                {
+                    Throw(New.ArgumentOutOfRangeException(_nameParam, "Value is greater than the maximum allowed.", false))
+                }
+            },
+            this);
+        }
+
+        private MethodProvider BuildCheckNotNullOrEmpty()
+        {
+            var valueParam = new ParameterProvider("value", $"The value.", typeof(string));
+            var signature = GetSignature(CheckNotNullOrEmptyMethodName, [valueParam, _nameParam], returnType: typeof(string));
+            return new MethodProvider(signature, new MethodBodyStatement[]
+            {
+                Static<ArgumentDefinition>().Invoke(AssertNotNullOrEmptyMethodName, [valueParam, _nameParam]).Terminate(),
+                Return(valueParam)
+            },
+            this);
+        }
+
         private MethodProvider BuildAssertNotNullOrEmptyString()
         {
             var valueParam = new ParameterProvider("value", $"The value.", typeof(string));
diff --git a/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/ArgumentTests.cs b/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/ArgumentTests.cs
index 05055d25ba1..222522530a6 100644
--- a/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/ArgumentTests.cs
+++ b/packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/ArgumentTests.cs
@@ -59,6 +59,71 @@ public void NotNullOrEmptyStringThrowsOnEmpty()
             Assert.Throws<ArgumentException>(() => Argument.AssertNotNullOrEmpty(string.Empty, "value"));
         }
 
+        [Test]
+        public void NotNullOrWhiteSpace()
+        {
+            string value = "test";
+            Argument.AssertNotNullOrWhiteSpace(value, "value");
+        }
+
+        [Test]
+        public void NotNullOrWhiteSpaceThrowsOnNull()
+        {
+            string? value = null;
+            Assert.Throws<ArgumentNullException>(() => Argument.AssertNotNullOrWhiteSpace(value, "value"));
+        }
+
+        [Test]
+        public void NotNullOrWhiteSpaceThrowsOnWhiteSpace()
+        {
+            Assert.Throws<ArgumentException>(() => Argument.AssertNotNullOrWhiteSpace("   ", "value"));
+        }
+
+        [Test]
+        public void NotNullOrWhiteSpaceThrowsOnEmpty()
+        {
+            Assert.Throws<ArgumentException>(() => Argument.AssertNotNullOrWhiteSpace(string.Empty, "value"));
+        }
+
+        [Test]
+        public void AssertInRange()
+        {
+            Argument.AssertInRange(5, 1, 10, "value");
+        }
+
+        [Test]
+        public void AssertInRangeThrowsWhenBelowMinimum()
+        {
+            Assert.Throws<ArgumentOutOfRangeException>(() => Argument.AssertInRange(0, 1, 10, "value"));
+        }
+
+        [Test]
+        public void AssertInRangeThrowsWhenAboveMaximum()
+        {
+            Assert.Throws<ArgumentOutOfRangeException>(() => Argument.AssertInRange(11, 1, 10, "value"));
+        }
+
+        [Test]
+        public void CheckNotNullOrEmpty()
+        {
+            string value = "test";
+            string result = Argument.CheckNotNullOrEmpty(value, "value");
+            Assert.AreEqual("test", result);
+        }
+
+        [Test]
+        public void CheckNotNullOrEmptyThrowsOnNull()
+        {
+            string? value = null;
+            Assert.Throws<ArgumentNullException>(() => Argument.CheckNotNullOrEmpty(value, "value"));
+        }
+
+        [Test]
+        public void CheckNotNullOrEmptyThrowsOnEmpty()
+        {
+            Assert.Throws<ArgumentException>(() => Argument.CheckNotNullOrEmpty(string.Empty, "value"));
+        }
+
         private readonly struct TestStructure : IEquatable<TestStructure>
         {
             internal readonly string A;
diff --git a/packages/http-client-csharp/generator/TestProjects/Local/Sample-TypeSpec/src/Generated/Internal/Argument.cs b/packages/http-client-csharp/generator/TestProjects/Local/Sample-TypeSpec/src/Generated/Internal/Argument.cs
index ec840fc17ad..e9d84f503cd 100644
--- a/packages/http-client-csharp/generator/TestProjects/Local/Sample-TypeSpec/src/Generated/Internal/Argument.cs
+++ b/packages/http-client-csharp/generator/TestProjects/Local/Sample-TypeSpec/src/Generated/Internal/Argument.cs
@@ -70,5 +70,44 @@ public static void AssertNotNullOrEmpty(string value, string name)
                 throw new ArgumentException("Value cannot be an empty string.", name);
             }
         }
+
+        /// <param name="value"> The value. </param>
+        /// <param name="name"> The name. </param>
+        public static void AssertNotNullOrWhiteSpace(string value, string name)
+        {
+            if (value is null)
+            {
+                throw new ArgumentNullException(name);
+            }
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                throw new ArgumentException("Value cannot be empty or contain only white-space characters.", name);
+            }
+        }
+
+        /// <param name="value"> The value. </param>
+        /// <param name="minimum"> The minimum value. </param>
+        /// <param name="maximum"> The maximum value. </param>
+        /// <param name="name"> The name. </param>
+        public static void AssertInRange<T>(T value, T minimum, T maximum, string name)
+            where T : notnull, IComparable<T>
+        {
+            if (minimum.CompareTo(value) > 0)
+            {
+                throw new ArgumentOutOfRangeException(name, "Value is less than the minimum allowed.");
+            }
+            if (maximum.CompareTo(value) < 0)
+            {
+                throw new ArgumentOutOfRangeException(name, "Value is greater than the maximum allowed.");
+            }
+        }
+
+        /// <param name="value"> The value. </param>
+        /// <param name="name"> The name. </param>
+        public static string CheckNotNullOrEmpty(string value, string name)
+        {
+            AssertNotNullOrEmpty(value, name);
+            return value;
+        }
     }
 }